Mozilla has 182 CVEs on record between 2020 and 2026. Disclosure cadence is accelerating: 86 in the last 90 days against 33 in the 90 before. The busiest recent month was September 2026 with 80. The median CVSS is 8.8 (high), with 35 rated critical. 2% have been exploited in the wild, in line with the corpus average. The dominant weakness classes are CWE-416 (36) and CWE-119 (22). Most affected products: Firefox (148), firefox_mobile (27), Thunderbird (4).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 2% vs 1% corpus
- Median CVSS
- 8.8
- Publish → KEV
- —(1)
- Last 90 days
- 86 prev 33
Weakness classes
Products
- Firefox 148
- firefox_mobile 27
- Thunderbird 4
- firefox_focus 2
- Firefox for iOS 1
Worst active — by depth score
CVE-2024-9680Critical· 9.8An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines89CVE-2022-26486Critical· 9.6An unexpected message in the WebGPU IPC framework could lead to a use-after-free and exploitable sandbox escape78CVE-2022-26485High· 8.8Removing an XSLT parameter during processing could have lead to an exploitable use-after-free76CVE-2026-74943Critical· 9.8Use-after-free in the Graphics: ImageLib component66CVE-2026-74936Critical· 9.8Use-after-free in the JavaScript: WebAssembly component66
Mozilla vulnerabilities
CVEs affecting Mozilla, newest first. Open any entry for full detail, references, and exploit status.
182 CVEsRSS
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.
CVE-2026-92030Medium· 5.4Mitigation bypass in the DOM: Copy & Paste and Drag & Drop component
Mitigation bypass in the DOM: Copy & Paste and Drag & Drop 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-2026-92029High· 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-2026-92033High· 8.8Privilege escalation in Firefox for Android
Privilege escalation in Firefox for Android. This vulnerability was fixed in Firefox 156.
CVE-2026-92032Critical· 9.6⚖ disputedSandbox escape due to invalid pointer in the Graphics component
Sandbox escape due to invalid pointer in the Graphics 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-2026-92031Medium· 6.5Information disclosure in the Graphics: ImageLib component
Information disclosure in the Graphics: ImageLib 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-2026-92036Critical· 9.8⚖ disputedIncorrect boundary conditions in the Networking: HTTP component
Incorrect boundary conditions in the Networking: HTTP component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVE-2026-92035Critical· 9.6⚖ disputedSandbox escape due to incorrect boundary conditions in the Graphics component
Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92034Critical· 9.1Site isolation issue in the Graphics component
Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVE-2026-92039Medium· 6.3Mitigation bypass in the DOM: Notifications component
Mitigation bypass in the DOM: Notifications component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92038Critical· 9.1Mitigation bypass in the Remote Settings Client component
Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92037Critical· 9.8⚖ disputedIncorrect boundary conditions in the DOM: Animation component
Incorrect boundary conditions in the DOM: Animation component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVE-2026-92042High· 7.5Race condition in the DOM: Content Processes component
Race condition in the DOM: Content Processes component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92041Critical· 9.1⚖ disputedMitigation bypass in the DOM: Networking component
Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92040High· 8.8⚖ disputedUse-after-free in the JavaScript: WebAssembly component
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVE-2026-92045Critical· 9.6⚖ disputedSandbox escape due to incorrect boundary conditions in the WebRTC component
Sandbox escape due to incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92044High· 7.5Information disclosure in the Networking: HTTP component
Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92043High· 8.8⚖ disputedPrivilege escalation due to incorrect boundary conditions in the Audio/Video component
Privilege escalation due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92048Critical· 9.0⚖ disputedSandbox escape due to incorrect boundary conditions in the Widget: Win32 component
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92047High· 8.8⚖ disputedPrivilege escalation in the Crash Reporting component
Privilege escalation in the Crash Reporting component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92046High· 8.8⚖ disputedUse-after-free in the Graphics component
Use-after-free in the Graphics component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92050Critical· 9.1⚖ disputedSandbox escape due to race condition in the XPConnect component
Sandbox escape due to race condition in the XPConnect component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVE-2026-92049High· 8.8⚖ disputedUse-after-free in the Widget: Win32 component
Use-after-free in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92054High· 8.8⚖ disputedPrivilege escalation in the Memory component
Privilege escalation in the Memory component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92052High· 8.8⚖ disputedPrivilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component
Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92051Critical· 9.1Spoofing issue due to invalid pointer in the Graphics component
Spoofing issue due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVE-2026-92056High· 8.8⚖ disputedUse-after-free in the Graphics: Text component
Use-after-free in the Graphics: Text component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVE-2026-92055High· 8.8⚖ disputedPrivilege escalation in the DevTools component
Privilege escalation in the DevTools component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.