Vulnerability-Lookup

OESA-2026-3577 (CVE-2026-74934)

Vulnerability from osv_openeuler – Published: 2026-08-30 04:18 – Updated: 2026-08-30 04:18 – Source website

Summary

thunderbird security update

Details

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

Site isolation issue in the Graphics: CanvasWebGL 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.(CVE-2026-74934)

A privilege escalation vulnerability exists in Mozilla Firefox and Thunderbird in the DOM: Networking component. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. An attacker could exploit this vulnerability to affect confidentiality, integrity, and availability. 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.(CVE-2026-74935)

Use-after-free in the JavaScript: WebAssembly 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.(CVE-2026-74936)

Privilege escalation in the DOM: Navigation 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.(CVE-2026-74939)

Use-after-free in the Graphics: Text 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.(CVE-2026-74940)

Privilege escalation in the Graphics: CanvasWebGL 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. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This has an impact on confidentiality, integrity, and availability.(CVE-2026-74941)

Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.(CVE-2026-74942)

Use-after-free 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.(CVE-2026-74943)

Use-after-free in the DOM: Core & HTML 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.(CVE-2026-74944)

Information disclosure in the Graphics: Text 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.(CVE-2026-74945)

Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL 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.(CVE-2026-74946)

Information disclosure 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.(CVE-2026-74948)

Privilege escalation due to use-after-free in the Graphics: Canvas2D 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.(CVE-2026-74949)

Privilege escalation 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.(CVE-2026-74953)

Mitigation bypass in the Safe Browsing 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.(CVE-2026-74957)

Mitigation bypass in the Storage: Cache API 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.(CVE-2026-74959)

Site isolation issue in the WebExtensions 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.(CVE-2026-74960)

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.(CVE-2026-74962)

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.(CVE-2026-74963)

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.(CVE-2026-74964)

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.(CVE-2026-74965)

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.(CVE-2026-74967)

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.(CVE-2026-74969)

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.(CVE-2026-74971)

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.(CVE-2026-74972)

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.(CVE-2026-74973)

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.(CVE-2026-74974)

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.(CVE-2026-74976)

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.(CVE-2026-74983)

Internally found bugs present in Firefox ESR 140.13, Firefox ESR 153.0 and Firefox 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.(CVE-2026-74987)

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.(CVE-2026-74990)

Severity

9.8 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74934	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74935	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74936	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74939	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74940	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74941	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74942	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74943	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74944	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74945	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74946	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74948	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74949	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74953	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74957	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74959	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74960	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74962	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74963	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74964	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74965	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74967	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74969	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74971	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74972	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74973	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74974	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74976	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74983	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74987	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-74990	ADVISORY

JSON

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{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "thunderbird-140.14.0-1.oe2403sp4.aarch64.rpm",
          "thunderbird-debuginfo-140.14.0-1.oe2403sp4.aarch64.rpm",
          "thunderbird-debugsource-140.14.0-1.oe2403sp4.aarch64.rpm",
          "thunderbird-librnp-rnp-140.14.0-1.oe2403sp4.aarch64.rpm",
          "thunderbird-wayland-140.14.0-1.oe2403sp4.aarch64.rpm"
        ],
        "src": [
          "thunderbird-140.14.0-1.oe2403sp4.src.rpm"
        ],
        "x86_64": [
          "thunderbird-140.14.0-1.oe2403sp4.x86_64.rpm",
          "thunderbird-debuginfo-140.14.0-1.oe2403sp4.x86_64.rpm",
          "thunderbird-debugsource-140.14.0-1.oe2403sp4.x86_64.rpm",
          "thunderbird-librnp-rnp-140.14.0-1.oe2403sp4.x86_64.rpm",
          "thunderbird-wayland-140.14.0-1.oe2403sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP4",
        "name": "thunderbird",
        "purl": "pkg:rpm/openEuler/thunderbird\u0026distro=openEuler-24.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "140.14.0-1.oe2403sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Critical"
  },
  "details": "Mozilla Thunderbird is a standalone mail and newsgroup client.\r\n\r\nSecurity Fix(es):\n\nSite isolation issue in the Graphics: CanvasWebGL 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.(CVE-2026-74934)\n\nA privilege escalation vulnerability exists in Mozilla Firefox and Thunderbird in the DOM: Networking component. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. An attacker could exploit this vulnerability to affect confidentiality, integrity, and availability. 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.(CVE-2026-74935)\n\nUse-after-free in the JavaScript: WebAssembly 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.(CVE-2026-74936)\n\nPrivilege escalation in the DOM: Navigation 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.(CVE-2026-74939)\n\nUse-after-free in the Graphics: Text 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.(CVE-2026-74940)\n\nPrivilege escalation in the Graphics: CanvasWebGL 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. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This has an impact on confidentiality, integrity, and availability.(CVE-2026-74941)\n\nPrivilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.(CVE-2026-74942)\n\nUse-after-free 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.(CVE-2026-74943)\n\nUse-after-free in the DOM: Core \u0026amp; HTML 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.(CVE-2026-74944)\n\nInformation disclosure in the Graphics: Text 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.(CVE-2026-74945)\n\nPrivilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL 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.(CVE-2026-74946)\n\nInformation disclosure 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.(CVE-2026-74948)\n\nPrivilege escalation due to use-after-free in the Graphics: Canvas2D 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.(CVE-2026-74949)\n\nPrivilege escalation 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.(CVE-2026-74953)\n\nMitigation bypass in the Safe Browsing 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.(CVE-2026-74957)\n\nMitigation bypass in the Storage: Cache API 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.(CVE-2026-74959)\n\nSite isolation issue in the WebExtensions 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.(CVE-2026-74960)\n\nSite 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.(CVE-2026-74962)\n\nSame-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.(CVE-2026-74963)\n\nInteger 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.(CVE-2026-74964)\n\nPrivilege 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.(CVE-2026-74965)\n\nSame-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.(CVE-2026-74967)\n\nUse-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.(CVE-2026-74969)\n\nInformation disclosure in the DOM: UI Events \u0026amp; 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.(CVE-2026-74971)\n\nInformation 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.(CVE-2026-74972)\n\nRace 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.(CVE-2026-74973)\n\nSame-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.(CVE-2026-74974)\n\nJIT 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.(CVE-2026-74976)\n\nMitigation 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.(CVE-2026-74983)\n\nInternally found bugs present in Firefox ESR 140.13, Firefox ESR 153.0 and Firefox 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.(CVE-2026-74987)\n\nInternally 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.(CVE-2026-74990)",
  "id": "OESA-2026-3577",
  "modified": "2026-08-30T04:18:26Z",
  "published": "2026-08-30T04:18:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3577"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74934"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74935"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74936"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74939"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74940"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74941"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74942"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74943"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74944"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74945"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74946"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74948"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74949"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74953"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74957"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74959"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74960"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74962"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74963"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74964"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74965"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74967"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74969"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74971"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74972"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74973"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74974"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74976"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74983"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74987"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74990"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "thunderbird security update",
  "upstream": [
    "CVE-2026-74934",
    "CVE-2026-74935",
    "CVE-2026-74936",
    "CVE-2026-74939",
    "CVE-2026-74940",
    "CVE-2026-74941",
    "CVE-2026-74942",
    "CVE-2026-74943",
    "CVE-2026-74944",
    "CVE-2026-74945",
    "CVE-2026-74946",
    "CVE-2026-74948",
    "CVE-2026-74949",
    "CVE-2026-74953",
    "CVE-2026-74957",
    "CVE-2026-74959",
    "CVE-2026-74960",
    "CVE-2026-74962",
    "CVE-2026-74963",
    "CVE-2026-74964",
    "CVE-2026-74965",
    "CVE-2026-74967",
    "CVE-2026-74969",
    "CVE-2026-74971",
    "CVE-2026-74972",
    "CVE-2026-74973",
    "CVE-2026-74974",
    "CVE-2026-74976",
    "CVE-2026-74983",
    "CVE-2026-74987",
    "CVE-2026-74990"
  ]
}

CVE-2026-74934 (GCVE-0-2026-74934)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 20:09

Title

Site isolation issue in the Graphics: CanvasWebGL component

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 20:08 UTC

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
CWE-284 - Improper Access Control
CWE-346 - Origin Validation Error

Assigner

mozilla mitre root

References

8 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2050584
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

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)

Credits

satyamasd

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
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              "baseScore": 7.5,
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          "dateUpdated": "2026-08-21T20:09:50.955Z",
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            }
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        }
      ],
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        "dateUpdated": "2026-08-18T18:54:55.765Z",
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      },
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        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2050584"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-74/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-75/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-76/"
        },
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        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-80/"
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      ],
      "title": "Site isolation issue in the Graphics: CanvasWebGL component"
    }
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  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
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    "dateReserved": "2026-08-17T11:57:25.126Z",
    "dateUpdated": "2026-08-21T20:09:50.955Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-74935 (GCVE-0-2026-74935)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 03:55

Title

Privilege escalation in the DOM: Networking component

Summary

Privilege escalation in the DOM: Networking 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)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 00:00 UTC

CWE

CWE-269 - Improper Privilege Management

Assigner

mozilla mitre root

References

8 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2051013
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

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)

Credits

Yaqoub Aldurayhim

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
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          {
            "other": {
              "content": {
                "id": "CVE-2026-74935",
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      "affected": [
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              "lessThanOrEqual": "115.*",
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            }
          ],
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        "dateUpdated": "2026-08-18T18:54:56.800Z",
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          "url": "https://www.mozilla.org/security/advisories/mfsa2026-74/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-75/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-76/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-77/"
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CVE-2026-74936 (GCVE-0-2026-74936)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 20:11

Title

Use-after-free in the JavaScript: WebAssembly component

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 20:10 UTC

CWE

CWE-416 - Use After Free

Assigner

mozilla mitre root

References

7 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2052688
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

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)

Credits

Amy Burnett of OpenAI

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseScore": 9.8,
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              "confidentialityImpact": "HIGH",
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          "vendor": "Mozilla",
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            }
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        "dateUpdated": "2026-08-18T18:54:57.812Z",
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        },
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        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-80/"
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      "title": "Use-after-free in the JavaScript: WebAssembly component"
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CVE-2026-74939 (GCVE-0-2026-74939)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 03:55

Title

Privilege escalation in the DOM: Navigation component

Summary

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 00:00 UTC

CWE

CWE-269 - Improper Privilege Management

Assigner

mozilla mitre root

References

8 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2054416
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

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)

Credits

choeseyeong

Show details on NVD website

JSON

To clipboard

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CVE-2026-74940 (GCVE-0-2026-74940)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 20:12

Title

Use-after-free in the Graphics: Text component

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 20:11 UTC

CWE

CWE-416 - Use After Free

Assigner

mozilla mitre root

References

8 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2054842
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

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)

Credits

kiyong

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
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        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-75/"
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          "url": "https://www.mozilla.org/security/advisories/mfsa2026-76/"
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          "url": "https://www.mozilla.org/security/advisories/mfsa2026-77/"
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          "url": "https://www.mozilla.org/security/advisories/mfsa2026-80/"
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CVE-2026-74941 (GCVE-0-2026-74941)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 03:55

Title

Privilege escalation in the Graphics: CanvasWebGL component

Summary

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 00:00 UTC

CWE

CWE-269 - Improper Privilege Management

Assigner

mozilla mitre root

References

7 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2055056
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

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)

Credits

Jacolon Walker

Show details on NVD website

JSON

To clipboard

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    "adp": [
      {
        "metrics": [
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CVE-2026-74942 (GCVE-0-2026-74942)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 03:55

Title

Privilege escalation in the Remote Settings Client component

Summary

Privilege escalation in the Remote Settings Client 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)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 00:00 UTC

CWE

CWE-269 - Improper Privilege Management

Assigner

mozilla mitre root

References

8 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2056571
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

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)

Credits

Gal Ankonina

Show details on NVD website

JSON

To clipboard

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            }
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CVE-2026-74943 (GCVE-0-2026-74943)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 20:14

Title

Use-after-free in the Graphics: ImageLib component

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 20:13 UTC

CWE

CWE-416 - Use After Free

Assigner

mozilla mitre root

References

8 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2057308
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

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)

Credits

Abdulaziz Alasaiqah

Show details on NVD website

JSON

To clipboard

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CVE-2026-74944 (GCVE-0-2026-74944)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 20:15

Title

Use-after-free in the DOM: Core & HTML component

Summary

Use-after-free in the DOM: Core & HTML 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)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 20:14 UTC

CWE

CWE-416 - Use After Free

Assigner

mozilla mitre root

References

7 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2057778
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

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)

Credits

Amy Burnett of OpenAI

Show details on NVD website

JSON

To clipboard

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CVE-2026-74945 (GCVE-0-2026-74945)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 19:58

Title

Information disclosure in the Graphics: Text component

Summary

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 19:58 UTC

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor

Assigner

mozilla mitre root

References

8 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2057808
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

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)

Credits

Abdulaziz Alasaiqah

Show details on NVD website

JSON

To clipboard

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        },
        {
          "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/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-79/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-80/"
        }
      ],
      "title": "Information disclosure in the Graphics: Text component"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2026-74945",
    "datePublished": "2026-08-18T12:23:29.811Z",
    "dateReserved": "2026-08-17T11:57:49.125Z",
    "dateUpdated": "2026-08-21T19:58:50.816Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

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.

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.

Action not permitted

OESA-2026-3577 (CVE-2026-74934)

CVE-2026-74934 (GCVE-0-2026-74934)

CVE-2026-74935 (GCVE-0-2026-74935)

CVE-2026-74936 (GCVE-0-2026-74936)

CVE-2026-74939 (GCVE-0-2026-74939)

CVE-2026-74940 (GCVE-0-2026-74940)

CVE-2026-74941 (GCVE-0-2026-74941)

CVE-2026-74942 (GCVE-0-2026-74942)

CVE-2026-74943 (GCVE-0-2026-74943)

CVE-2026-74944 (GCVE-0-2026-74944)

CVE-2026-74945 (GCVE-0-2026-74945)

Tags

Sightings

Nomenclature

Related by attack behaviour