Mozilla has 722 CVEs on record between 2016 and 2026. Disclosure cadence is accelerating: 438 in the last 90 days against 62 in the 90 before. The busiest recent month was October 2026 with 265. The median CVSS is 8.1 (high), with 141 rated critical. 0% have been exploited in the wild, in line with the corpus average. The dominant weakness classes are CWE-416 (108) and CWE-119 (56). Most affected products: Firefox (665), firefox_mobile (30), Thunderbird (19).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 0% vs 1% corpus
- Median CVSS
- 8.1
- Publish → KEV
- —(1)
- Last 90 days
- 438 prev 62
Weakness classes
Products
- Firefox 665
- firefox_mobile 30
- Thunderbird 19
- Firefox for iOS 4
- firefox_focus 2
- Node-convict 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.
722 CVEsRSS
CVE-2026-109757High· 8.3Sandbox escape due to race condition in the Networking component
Sandbox escape due to race condition in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109756High· 8.8Privilege escalation in the DOM: Navigation component
Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109755Critical· 9.6Sandbox escape in the DOM: Content Processes component
Sandbox escape in the DOM: Content Processes component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
CVE-2026-109754High· 8.1Incorrect boundary conditions in the DOM: Editor component
Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109753High· 8.1Incorrect boundary conditions in the Layout component
Incorrect boundary conditions in the Layout component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109752Medium· 5.4Use-after-free in the DOM: Workers component
Use-after-free in the DOM: Workers component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109751Medium· 4.3Information disclosure in the Networking component
Information disclosure in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109750Critical· 9.6Site isolation issue in the DOM: Web Authentication component
Site isolation issue in the DOM: Web Authentication component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
CVE-2026-109749Medium· 5.4Use-after-free in the JavaScript: WebAssembly component
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
CVE-2026-109748Medium· 5.4Use-after-free in the JavaScript: WebAssembly component
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
CVE-2026-109747High· 7.3Other issue in the Address Bar component
Other issue in the Address Bar component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
CVE-2026-109746High· 7.3Mitigation bypass in the DOM: Security component
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
CVE-2026-109745Critical· 9.6Sandbox escape due to uninitialized memory in the DOM: Web Serial component
Sandbox escape due to uninitialized memory in the DOM: Web Serial component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109744High· 8.1Other issue in the DOM: File component
Other issue in the DOM: File component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109743High· 8.8Privilege escalation in the Panning and Zooming component
Privilege escalation in the Panning and Zooming component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109742Medium· 4.3Information disclosure in the PDF Viewer component
Information disclosure in the PDF Viewer component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109741Medium· 5.4Use-after-free in the Storage: Bucket File System component
Use-after-free in the Storage: Bucket File System component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109739High· 8.8Privilege escalation in the WebExtensions component
Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
CVE-2026-109738Medium· 5.4Use-after-free in the Audio/Video: Playback component
Use-after-free in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109737High· 8.1Mitigation bypass in the Enterprise Policies component
Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109736High· 8.1Frame poisoning in the Layout component
Frame poisoning in the Layout component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109735Medium· 5.4Use-after-free in the DOM: Animation component
Use-after-free in the DOM: Animation component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
CVE-2026-109734High· 8.1Mitigation bypass in the DOM: Security component
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109733High· 8.1JIT miscompilation in the JavaScript Engine: JIT component
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109732Medium· 5.4⚖ disputedUse-after-free in the DOM: Streams component
Use-after-free in the DOM: Streams component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109731Medium· 5.4Incorrect boundary conditions in the Graphics: Canvas2D component
Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109730High· 8.8Integer overflow in the Graphics component
Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109728Medium· 5.4Use-after-free in the DOM: Animation component
Use-after-free in the DOM: Animation component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109727Medium· 5.4⚖ disputedUse-after-free in the Audio/Video component
Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVE-2026-109726Medium· 5.4⚖ disputedUse-after-free in the SVG component
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.