CVE-2025-11679 (GCVE-0-2025-11679)
Vulnerability from cvelistv5 – Published: 2025-10-20 13:58 – Updated: 2025-10-20 14:03
VLAI
EPSS
VEX
Title
Out-of-bounds Read in libwebsockets PNG parsing
Summary
Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-20 14:02 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://libwebsockets.org/git/libwebsockets/commi… | patchvendor-advisory |
| https://www.nozominetworks.com/labs/vulnerability… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| warmcat | libwebsockets |
Affected:
4.0 , ≤ 4.4.2
(semver)
Affected: 4.0 , ≤ 4.3.6 (semver) |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-11679",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-20T14:02:56.942722Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-10-20T14:03:41.592Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://libwebsockets.org/git/libwebsockets",
"defaultStatus": "unaffected",
"modules": [
"lws_upng_emit_next_line"
],
"product": "libwebsockets",
"vendor": "warmcat",
"versions": [
{
"lessThanOrEqual": "4.4.2",
"status": "affected",
"version": "4.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.3.6",
"status": "affected",
"version": "4.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Raffaele Bova at Nozomi Networks"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension."
}
],
"value": "Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension."
}
],
"impacts": [
{
"capecId": "CAPEC-540",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-540 Overread Buffers"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "ACTIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125 Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-20T13:58:31.286Z",
"orgId": "bec8025f-a851-46e5-b3a3-058e6b0aa23c",
"shortName": "Nozomi"
},
"references": [
{
"tags": [
"patch",
"vendor-advisory"
],
"url": "https://libwebsockets.org/git/libwebsockets/commit?id=7df24cca7144d7bc9233b6b0a71108bd154ce101"
},
{
"tags": [
"third-party-advisory"
],
"url": "https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Update the library to its latest stable release, if not possible backport the fix commit 7df24cca7144d7bc9233b6b0a71108bd154ce101"
}
],
"value": "Update the library to its latest stable release, if not possible backport the fix commit 7df24cca7144d7bc9233b6b0a71108bd154ce101"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Out-of-bounds Read in libwebsockets PNG parsing",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "bec8025f-a851-46e5-b3a3-058e6b0aa23c",
"assignerShortName": "Nozomi",
"cveId": "CVE-2025-11679",
"datePublished": "2025-10-20T13:58:31.286Z",
"dateReserved": "2025-10-13T09:56:49.533Z",
"dateUpdated": "2025-10-20T14:03:41.592Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-11679",
"date": "2026-10-10",
"epss": "0.00394",
"percentile": "0.31544"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"collectionURL": "https://libwebsockets.org/git/libwebsockets",
"defaultStatus": "unaffected",
"modules": [
"lws_upng_emit_next_line"
],
"product": "libwebsockets",
"vendor": "warmcat",
"versions": [
{
"lessThanOrEqual": "4.4.2",
"status": "affected",
"version": "4.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.3.6",
"status": "affected",
"version": "4.0",
"versionType": "semver"
}
]
}
],
"source": "prodsec@nozominetworks.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension."
},
{
"lang": "es",
"value": "Lectura fuera de l\u00edmites en lws_upng_emit_next_line en warmcat libwebsockets permite, cuando la bandera LWS_WITH_UPNG est\u00e1 habilitada durante la compilaci\u00f3n y se utiliza la pila de visualizaci\u00f3n HTML, leer m\u00e1s all\u00e1 de un b\u00fafer asignado en el mont\u00f3n, posiblemente causando un fallo, cuando el usuario visita un sitio web controlado por un atacante que contiene un archivo PNG manipulado con una gran dimensi\u00f3n de altura."
}
],
"id": "CVE-2025-11679",
"lastModified": "2026-10-08T22:10:00.563",
"metrics": {
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "ACTIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "prodsec@nozominetworks.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-11679",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-20T14:02:56.942722Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-10-20T14:15:40.353",
"references": [
{
"source": "prodsec@nozominetworks.com",
"url": "https://libwebsockets.org/git/libwebsockets/commit?id=7df24cca7144d7bc9233b6b0a71108bd154ce101"
},
{
"source": "prodsec@nozominetworks.com",
"url": "https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679"
}
],
"sourceIdentifier": "prodsec@nozominetworks.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-125"
}
],
"source": "prodsec@nozominetworks.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-04-10T04:31:15+00:00",
"cve": "CVE-2025-11679",
"id": "CVE-2025-11679",
"initial_release_date": "2025-10-20T13:58:31.286000+00:00",
"product_status:known_affected": "5",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "libwebsockets: Out-of-bounds Read in libwebsockets PNG parsing",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-11679.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2025-10-20T23:40:09Z",
"cve": "CVE-2025-11679",
"id": "CVE-2025-11679",
"initial_release_date": "2025-10-20T23:40:09Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-11679",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-11679.json",
"version": "2"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-11679",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-20T14:02:56.942722Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-10-20T14:03:20.604Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://libwebsockets.org/git/libwebsockets",
"defaultStatus": "unaffected",
"modules": [
"lws_upng_emit_next_line"
],
"product": "libwebsockets",
"vendor": "warmcat",
"versions": [
{
"lessThanOrEqual": "4.4.2",
"status": "affected",
"version": "4.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.3.6",
"status": "affected",
"version": "4.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Raffaele Bova at Nozomi Networks"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension."
}
],
"value": "Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension."
}
],
"impacts": [
{
"capecId": "CAPEC-540",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-540 Overread Buffers"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "ACTIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125 Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-20T13:58:31.286Z",
"orgId": "bec8025f-a851-46e5-b3a3-058e6b0aa23c",
"shortName": "Nozomi"
},
"references": [
{
"tags": [
"patch",
"vendor-advisory"
],
"url": "https://libwebsockets.org/git/libwebsockets/commit?id=7df24cca7144d7bc9233b6b0a71108bd154ce101"
},
{
"tags": [
"third-party-advisory"
],
"url": "https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Update the library to its latest stable release, if not possible backport the fix commit 7df24cca7144d7bc9233b6b0a71108bd154ce101"
}
],
"value": "Update the library to its latest stable release, if not possible backport the fix commit 7df24cca7144d7bc9233b6b0a71108bd154ce101"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Out-of-bounds Read in libwebsockets PNG parsing",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "bec8025f-a851-46e5-b3a3-058e6b0aa23c",
"assignerShortName": "Nozomi",
"cveId": "CVE-2025-11679",
"datePublished": "2025-10-20T13:58:31.286Z",
"dateReserved": "2025-10-13T09:56:49.533Z",
"dateUpdated": "2025-10-20T14:03:41.592Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…