Firefox vulnerabilities
CVEs whose affected-version data names the Firefox package. Each record lists the affected and patched versions; check a specific version with the dependency checker or POST /api/sbom.
152 CVEsRSS
CVE-2026-92079Low· 3.4Mitigation bypass in the Widget: Win32 component
Mitigation bypass in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92078Medium· 6.5⚖ disputedDenial-of-service in the Security component
Denial-of-service in the Security component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92077Medium· 6.5⚖ disputedDenial-of-service in the SVG component
Denial-of-service in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92076Low· 3.4Incorrect boundary conditions in the Networking component
Incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92075Low· 3.4Mitigation bypass in the Networking component
Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92074Low· 3.4Mitigation bypass in the Popup Blocker component
Mitigation bypass in the Popup Blocker component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92006High· 8.8Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16…
CVE-2026-92015High· 8.8Privilege escalation in the WebExtensions component
Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92007High· 8.8Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16…
CVE-2026-92005Medium· 5.3⚖ disputedUse-after-free in the Audio/Video: Web Codecs component
Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92013High· 8.8Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16…
CVE-2026-92008High· 8.8Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16…
CVE-2026-92011High· 8.8Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16…
CVE-2026-92010High· 8.8Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16…
CVE-2026-92009High· 8.8Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16…
CVE-2026-92014High· 8.8Privilege escalation due to incorrect boundary conditions in the Graphics component
Privilege escalation due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox ESR 115.41, Firefox ESR 140.16, and Thunderbird 140.16.
CVE-2026-92012High· 8.8Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16…
CVE-2026-92016High· 8.8Use-after-free in the Disability Access APIs component
Use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92017High· 8.8Privilege escalation in the DOM: Service Workers component
Privilege escalation in the DOM: Service Workers component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92020High· 8.8Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender component
Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, …
CVE-2026-92019High· 8.1Mitigation bypass in the Remote Settings Client component
Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92018Critical· 9.6⚖ disputedSandbox escape in the DOM: Core & HTML component
Sandbox escape in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92023High· 8.8Use-after-free in the XML component
Use-after-free in the XML component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92021High· 8.8Use-after-free in the JavaScript Engine: JIT component
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 140.16 and Thunderbird 140.16.
CVE-2026-92026High· 8.8Use-after-free in the Networking component
Use-after-free in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92024High· 8.8Use-after-free in the SVG component
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92022High· 8.8Use-after-free in the DOM: HTML Parser component
Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92028High· 8.8Use-after-free in the DOM: Core & HTML component
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92027High· 8.8Use-after-free in the DOM: Streams component
Use-after-free in the DOM: Streams component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
CVE-2026-92025High· 8.8Use-after-free in the DOM: Navigation component
Use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.