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4210 vulnerabilities found for thunderbird by mozilla
CERTFR-2026-AVI-1054
Vulnerability from certfr_avis - Published: 2026-08-19 - Updated: 2026-08-19
De multiples vulnérabilités ont été découvertes dans les produits Mozilla. Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, un déni de service à distance et une atteinte à la confidentialité des données.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Mozilla | Thunderbird | Thunderbird versions antérieures à 154 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 115.39 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 153.1 | ||
| Mozilla | Thunderbird ESR | Thunderbird ESR versions antérieures à 140.14 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 140.14 | ||
| Mozilla | Thunderbird ESR | Thunderbird ESR versions antérieures à 153.1 | ||
| Mozilla | Firefox | Firefox versions antérieures à 154 |
References
| Title | Publication Time | Tags | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Thunderbird versions ant\u00e9rieures \u00e0 154",
"product": {
"name": "Thunderbird",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 115.39",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 153.1",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Thunderbird ESR versions ant\u00e9rieures \u00e0 140.14",
"product": {
"name": "Thunderbird ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 140.14",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Thunderbird ESR versions ant\u00e9rieures \u00e0 153.1",
"product": {
"name": "Thunderbird ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox versions ant\u00e9rieures \u00e0 154",
"product": {
"name": "Firefox",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-74973",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74973"
},
{
"name": "CVE-2026-74966",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74966"
},
{
"name": "CVE-2026-74944",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74944"
},
{
"name": "CVE-2026-74936",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74936"
},
{
"name": "CVE-2026-74989",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74989"
},
{
"name": "CVE-2026-74948",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74948"
},
{
"name": "CVE-2026-74963",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74963"
},
{
"name": "CVE-2026-74975",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74975"
},
{
"name": "CVE-2026-74946",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74946"
},
{
"name": "CVE-2026-74947",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74947"
},
{
"name": "CVE-2026-74951",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74951"
},
{
"name": "CVE-2026-74974",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74974"
},
{
"name": "CVE-2026-74937",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74937"
},
{
"name": "CVE-2026-74967",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74967"
},
{
"name": "CVE-2026-74978",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74978"
},
{
"name": "CVE-2026-74955",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74955"
},
{
"name": "CVE-2026-74990",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74990"
},
{
"name": "CVE-2026-74972",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74972"
},
{
"name": "CVE-2026-74980",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74980"
},
{
"name": "CVE-2026-74956",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74956"
},
{
"name": "CVE-2026-74958",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74958"
},
{
"name": "CVE-2026-74969",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74969"
},
{
"name": "CVE-2026-74953",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74953"
},
{
"name": "CVE-2026-74945",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74945"
},
{
"name": "CVE-2026-74950",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74950"
},
{
"name": "CVE-2026-74968",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74968"
},
{
"name": "CVE-2026-74965",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74965"
},
{
"name": "CVE-2026-74986",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74986"
},
{
"name": "CVE-2026-74970",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74970"
},
{
"name": "CVE-2026-74959",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74959"
},
{
"name": "CVE-2026-74949",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74949"
},
{
"name": "CVE-2026-74940",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74940"
},
{
"name": "CVE-2026-74984",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74984"
},
{
"name": "CVE-2026-74943",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74943"
},
{
"name": "CVE-2026-74979",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74979"
},
{
"name": "CVE-2026-74988",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74988"
},
{
"name": "CVE-2026-74954",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74954"
},
{
"name": "CVE-2026-74960",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74960"
},
{
"name": "CVE-2026-74964",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74964"
},
{
"name": "CVE-2026-74957",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74957"
},
{
"name": "CVE-2026-74985",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74985"
},
{
"name": "CVE-2026-74939",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74939"
},
{
"name": "CVE-2026-74952",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74952"
},
{
"name": "CVE-2026-74961",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74961"
},
{
"name": "CVE-2026-74971",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74971"
},
{
"name": "CVE-2026-74941",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74941"
},
{
"name": "CVE-2026-74976",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74976"
},
{
"name": "CVE-2026-74935",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74935"
},
{
"name": "CVE-2026-74987",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74987"
},
{
"name": "CVE-2026-75874",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-75874"
},
{
"name": "CVE-2026-74982",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74982"
},
{
"name": "CVE-2026-74981",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74981"
},
{
"name": "CVE-2026-74977",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74977"
},
{
"name": "CVE-2026-74934",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74934"
},
{
"name": "CVE-2026-74938",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74938"
},
{
"name": "CVE-2026-74962",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74962"
},
{
"name": "CVE-2026-74942",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74942"
},
{
"name": "CVE-2026-74983",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74983"
}
],
"initial_release_date": "2026-08-19T00:00:00",
"last_revision_date": "2026-08-19T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-1054",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-08-19T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
},
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans les produits Mozilla. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges, un d\u00e9ni de service \u00e0 distance et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans les produits Mozilla",
"vendor_advisories": [
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-80",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-80/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-75",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-75/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-74",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-74/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-76",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-76/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-77",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-77/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-79",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-79/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-78",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-78/"
}
]
}
CVE-2026-75874 (GCVE-0-2026-75874)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:24
VLAI
EPSS
VEX
Title
Sandbox escape in the Remote Settings Client component
Summary
Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154 and Thunderbird 154.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:23 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
154 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
154 , ≤ *
(rpm)
|
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 10,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-75874",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-18T19:23:52.490532Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-693",
"description": "CWE-693 Protection Mechanism Failure",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T19:24:04.720Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "154",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "154",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "crixer"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154 and Thunderbird 154."
}
],
"value": "Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154 and Thunderbird 154."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T18:55:26.251Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2039972"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-74/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-78/"
}
],
"title": "Sandbox escape in the Remote Settings Client component"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-75874",
"datePublished": "2026-08-18T12:23:35.478Z",
"dateReserved": "2026-08-18T12:23:35.313Z",
"dateUpdated": "2026-08-18T19:24:04.720Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-74990 (GCVE-0-2026-74990)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:28
VLAI
EPSS
VEX
Title
Internally found bugs fixed in Thunderbird ESR 140.14, Thunderbird ESR 153.1 and Thunderbird 154
Summary
Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:27 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
9 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.39 , ≤ 115.*
(rpm)
Unaffected: 140.14 , ≤ 140.* (rpm) Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-74990",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-18T19:27:52.706061Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T19:28:52.918Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "115.*",
"status": "unaffected",
"version": "115.39",
"versionType": "rpm"
},
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.14",
"versionType": "rpm"
},
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.1",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "154",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.14",
"versionType": "rpm"
},
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.1",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
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]
}
],
"credits": [
{
"lang": "en",
"value": "Christian Holler, Jan de Mooij, Tom Ritter and the Mozilla Fuzzing Team"
}
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}
],
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}
],
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},
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},
{
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}
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CVE-2026-74989 (GCVE-0-2026-74989)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Internally found bugs fixed in Thunderbird 154
Summary
Internally found bugs present in Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154 and Thunderbird 154.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
154 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
154 , ≤ *
(rpm)
|
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}
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}
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},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-74/"
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"title": "Internally found bugs fixed in Thunderbird 154"
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CVE-2026-74988 (GCVE-0-2026-74988)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Internally found bugs fixed in Thunderbird ESR 153.1 and Thunderbird 154
Summary
Internally found bugs present in Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
No CVSS data available.
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
{
"containers": {
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{
"product": "Firefox",
"vendor": "Mozilla",
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}
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}
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},
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},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-74/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-77/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-78/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-80/"
}
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CVE-2026-74987 (GCVE-0-2026-74987)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-19 13:05
VLAI
EPSS
VEX
Title
Internally found bugs fixed in Thunderbird ESR 140.14, Thunderbird ESR 153.1 and Thunderbird 154
Summary
Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 13:05 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
9 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
{
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"baseScore": 9.8,
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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}
],
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}
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{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-74/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-76/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-77/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-78/"
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},
{
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CVE-2026-74986 (GCVE-0-2026-74986)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Site isolation issue in the CSS Parsing and Computation component
Summary
Site isolation issue in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
{
"containers": {
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"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.1",
"versionType": "rpm"
},
{
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"status": "unaffected",
"version": "154",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
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"status": "unaffected",
"version": "153.1",
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"versionType": "rpm"
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"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
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}
],
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}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T18:55:46.878Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2060048"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-74/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-77/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-78/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-80/"
}
],
"title": "Site isolation issue in the CSS Parsing and Computation component"
}
},
"cveMetadata": {
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"assignerShortName": "mozilla",
"cveId": "CVE-2026-74986",
"datePublished": "2026-08-18T12:23:41.380Z",
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"dateUpdated": "2026-08-18T18:55:46.878Z",
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CVE-2026-74985 (GCVE-0-2026-74985)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Privilege escalation in the Enterprise Policies component
Summary
Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
{
"containers": {
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.1",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
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"version": "154",
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}
],
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CVE-2026-74984 (GCVE-0-2026-74984)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Race condition in the JavaScript Engine component
Summary
Race condition in the JavaScript Engine component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74983 (GCVE-0-2026-74983)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-19 13:35
VLAI
EPSS
VEX
Title
Mitigation bypass in the Data Loss Prevention component
Summary
Mitigation bypass in the Data Loss Prevention component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 13:35 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74982 (GCVE-0-2026-74982)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Denial-of-service in the Widget component
Summary
Denial-of-service in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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"version": "154",
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"vendor": "Mozilla",
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"versionType": "rpm"
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"lang": "en",
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"base64": false,
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}
],
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CVE-2026-74981 (GCVE-0-2026-74981)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Site isolation issue in the Audio/Video: Web Codecs component
Summary
Site isolation issue in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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"product": "Firefox",
"vendor": "Mozilla",
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"status": "unaffected",
"version": "153.1",
"versionType": "rpm"
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"status": "unaffected",
"version": "154",
"versionType": "rpm"
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},
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"vendor": "Mozilla",
"versions": [
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"lessThanOrEqual": "153.*",
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"version": "153.1",
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"versionType": "rpm"
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"base64": false,
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}
],
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}
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"url": "https://www.mozilla.org/security/advisories/mfsa2026-77/"
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{
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CVE-2026-74979 (GCVE-0-2026-74979)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Mitigation bypass in the Add-ons Manager component
Summary
Mitigation bypass in the Add-ons Manager component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 18:54 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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"attackVector": "NETWORK",
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"baseScore": 9.8,
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"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"vendor": "Mozilla",
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}
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},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-77/"
},
{
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{
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CVE-2026-74978 (GCVE-0-2026-74978)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:57
VLAI
EPSS
VEX
Title
Clickjacking issue in the Widget component
Summary
Clickjacking issue in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 18:57 UTC
CWE
- CWE-1021 - Improper Restriction of Rendered UI Layers or Frames
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74977 (GCVE-0-2026-74977)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:59
VLAI
EPSS
VEX
Title
Integer overflow in the Graphics component
Summary
Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 18:59 UTC
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74976 (GCVE-0-2026-74976)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-19 13:04
VLAI
EPSS
VEX
Title
JIT miscompilation in the JavaScript Engine: JIT component
Summary
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 13:03 UTC
CWE
- CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74974 (GCVE-0-2026-74974)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:24
VLAI
EPSS
VEX
Title
Same-origin policy bypass in the Graphics: ImageLib component
Summary
Same-origin policy bypass in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:24 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.39 , ≤ 115.*
(rpm)
Unaffected: 140.14 , ≤ 140.* (rpm) Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74973 (GCVE-0-2026-74973)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Race condition, use-after-free in the Graphics component
Summary
Race condition, use-after-free in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 15:37 UTC
CWE
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.39 , ≤ 115.*
(rpm)
Unaffected: 140.14 , ≤ 140.* (rpm) Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74972 (GCVE-0-2026-74972)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:23
VLAI
EPSS
VEX
Title
Information disclosure in the DOM: Push Subscriptions component
Summary
Information disclosure in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:22 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74971 (GCVE-0-2026-74971)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:22
VLAI
EPSS
VEX
Title
Information disclosure in the DOM: UI Events & Focus Handling component
Summary
Information disclosure in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:22 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74970 (GCVE-0-2026-74970)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Site isolation issue in the Graphics component
Summary
Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 15:40 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74969 (GCVE-0-2026-74969)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-19 13:01
VLAI
EPSS
VEX
Title
Use-after-free in the Layout: Text and Fonts component
Summary
Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 13:01 UTC
CWE
- CWE-359 - Exposure of Private Personal Information to an Unauthorized Actor
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.39 , ≤ 115.*
(rpm)
Unaffected: 140.14 , ≤ 140.* (rpm) Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74968 (GCVE-0-2026-74968)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Site isolation issue in the Graphics: WebRender component
Summary
Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 15:13 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74967 (GCVE-0-2026-74967)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:24
VLAI
EPSS
VEX
Title
Same-origin policy bypass in the Audio/Video: Playback component
Summary
Same-origin policy bypass in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:23 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74966 (GCVE-0-2026-74966)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Information disclosure in the Form Autofill component
Summary
Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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"vendor": "Mozilla",
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CVE-2026-74965 (GCVE-0-2026-74965)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Privilege escalation in the Shell Integration component
Summary
Privilege escalation in the Shell Integration component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 15:36 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74964 (GCVE-0-2026-74964)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-19 12:55
VLAI
EPSS
VEX
Title
Integer overflow in the Graphics component
Summary
Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 12:55 UTC
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74963 (GCVE-0-2026-74963)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:23
VLAI
EPSS
VEX
Title
Same-origin policy bypass in the Networking: Cookies component
Summary
Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:23 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74962 (GCVE-0-2026-74962)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-19 12:52
VLAI
EPSS
VEX
Title
Site isolation issue in the Networking: Cookies component
Summary
Site isolation issue in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 12:52 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74961 (GCVE-0-2026-74961)
Vulnerability from nvd – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Side-channel in the Web Audio component
Summary
Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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