Mozilla has 182 CVEs on record between 2020 and 2026. Disclosure cadence is accelerating: 85 in the last 90 days against 33 in the 90 before. The busiest recent month was September 2026 with 79. The median CVSS is 8.8 (high), with 40 rated critical. 2% have been exploited in the wild, in line with the corpus average. The dominant weakness classes are CWE-416 (37) and CWE-119 (25). Most affected products: Firefox (149), firefox_mobile (27), thunderbird (3).
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
- 85 prev 33
Weakness classes
Products
- Firefox 149
- firefox_mobile 27
- thunderbird 3
- 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-2026-24869High· 8.8Use-after-free in the Layout: Scrolling and Overflow component
Use-after-free in the Layout: Scrolling and Overflow component. This vulnerability was fixed in Firefox 147.0.2.
CVE-2026-0891High· 8.1Memory safety bugs present in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146
Memory safety bugs present in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploit…
CVE-2026-0882High· 8.8Use-after-free in the IPC component
Use-after-free in the IPC component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0881Critical· 10.0Sandbox escape in the Messaging System component
Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
CVE-2026-0880High· 8.8Sandbox escape due to integer overflow in the Graphics component
Sandbox escape due to integer overflow in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0879Critical· 9.8Sandbox 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 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0878High· 8.0Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0877High· 8.1Mitigation bypass in the DOM: Security component
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2025-14860Critical· 9.8Use-after-free in the Disability Access APIs component
Use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 146.0.1.
CVE-2024-9680Critical· 9.8CISA KEV0dayPoCAn attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines
An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This vulnerability affects Firefox < 131.…
CVE-2024-43113Medium· 6.1The contextual menu for links could provide an opportunity for cross-site scripting attacks This vulnerability affects Firefox for iOS < 129.
The contextual menu for links could provide an opportunity for cross-site scripting attacks This vulnerability affects Firefox for iOS < 129.
CVE-2024-43112Medium· 6.1Long pressing on a download link could potentially provide a means for cross-site scripting This vulnerability affects Firefox for iOS < 129.
Long pressing on a download link could potentially provide a means for cross-site scripting This vulnerability affects Firefox for iOS < 129.
CVE-2024-43111Medium· 6.1Long pressing on a download link could potentially allow Javascript commands to be executed within the browser This vulnerability affects Firefox for iOS < 129.
Long pressing on a download link could potentially allow Javascript commands to be executed within the browser This vulnerability affects Firefox for iOS < 129.
CVE-2024-7523High· 8.1A select option could partially obscure security prompts
A select option could partially obscure security prompts. This could be used by a malicious site to trick a user into granting permissions. *This issue only affects Android versions of Firefox.* This vulnerability affects Firefox < 129.
CVE-2024-38313Medium· 4.3In certain scenarios a malicious website could attempt to display a fake location URL bar which could mislead users as to the actual website address This vulnerability affects Firefox for iOS < 127.
In certain scenarios a malicious website could attempt to display a fake location URL bar which could mislead users as to the actual website address This vulnerability affects Firefox for iOS < 127.
CVE-2024-38312Medium· 6.5When browsing private tabs, some data related to location history or webpage thumbnails could be persisted incorrectly within the sandboxed app bundle after app termination This vulnerability affects Firefox for iOS < 127.
When browsing private tabs, some data related to location history or webpage thumbnails could be persisted incorrectly within the sandboxed app bundle after app termination This vulnerability affects Firefox for iOS < 127.
CVE-2024-0953Medium· 6.1When a user scans a QR Code with the QR Code Scanner feature, the user is not prompted before being navigated to the page specified in the code
When a user scans a QR Code with the QR Code Scanner feature, the user is not prompted before being navigated to the page specified in the code. This may surprise the user and potentially direct them to unwanted content. This vulnerabil…
CVE-2023-49061Medium· 6.1An attacker could have performed HTML template injection via Reader Mode and exfiltrated user information
An attacker could have performed HTML template injection via Reader Mode and exfiltrated user information. This vulnerability affects Firefox for iOS < 120.
CVE-2023-49060Critical· 9.8An attacker could have accessed internal pages or data by ex-filtrating a security key from ReaderMode via the `referrerpolicy` attribute
An attacker could have accessed internal pages or data by ex-filtrating a security key from ReaderMode via the `referrerpolicy` attribute. This vulnerability affects Firefox for iOS < 120.
CVE-2023-5758Medium· 6.1When opening a page in reader mode, the redirect URL could have caused attacker-controlled script to execute in a reflected Cross-Site Scripting (XSS) attack
When opening a page in reader mode, the redirect URL could have caused attacker-controlled script to execute in a reflected Cross-Site Scripting (XSS) attack. This vulnerability affects Firefox for iOS < 119.
CVE-2023-29546Medium· 6.5When recording the screen while in Private Browsing on Firefox for Android the address bar and keyboard were not hidden, potentially leaking sensitive information
When recording the screen while in Private Browsing on Firefox for Android the address bar and keyboard were not hidden, potentially leaking sensitive information. *This bug only affects Firefox for Android. Other operating systems are…
CVE-2023-29534Critical· 9.1Different techniques existed to obscure the fullscreen notification in Firefox and Focus for Android
Different techniques existed to obscure the fullscreen notification in Firefox and Focus for Android. These could have led to potential user confusion and spoofing attacks. *This bug only affects Firefox and Focus for Android. Other ve…
CVE-2023-25747High· 7.5A potential use-after-free in libaudio was fixed by disabling the AAudio backend when running on Android API below version 30. *This bug only affects Firefox for Android
A potential use-after-free in libaudio was fixed by disabling the AAudio backend when running on Android API below version 30. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.* This vulnerability affe…
CVE-2023-29551High· 8.8Memory safety bugs present in Firefox 111
Memory safety bugs present in Firefox 111. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox f…
CVE-2023-29550High· 8.8Memory safety bugs present in Firefox 111 and Firefox ESR 102.9
Memory safety bugs present in Firefox 111 and Firefox ESR 102.9. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerabi…
CVE-2023-29549Medium· 6.5Under certain circumstances, a call to the <code>bind</code> function may have resulted in the incorrect realm
Under certain circumstances, a call to the <code>bind</code> function may have resulted in the incorrect realm. This may have created a vulnerability relating to JavaScript-implemented sandboxes such as SES. This vulnerability affects Fi…
CVE-2023-29548Medium· 6.5A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization result
A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization result. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.
CVE-2023-29544Medium· 6.5If multiple instances of resource exhaustion occurred at the incorrect time, the garbage collector could have caused memory corruption and a potentially exploitable crash
If multiple instances of resource exhaustion occurred at the incorrect time, the garbage collector could have caused memory corruption and a potentially exploitable crash. This vulnerability affects Firefox for Android < 112, Firefox < 1…
CVE-2023-29543High· 8.8An attacker could have caused memory corruption and a potentially exploitable use-after-free of a pointer in a global object's debugger vector
An attacker could have caused memory corruption and a potentially exploitable use-after-free of a pointer in a global object's debugger vector. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < …
CVE-2023-29541High· 8.8Firefox did not properly handle downloads of files ending in <code>.desktop</code>, which can be interpreted to run attacker-controlled commands
Firefox did not properly handle downloads of files ending in <code>.desktop</code>, which can be interpreted to run attacker-controlled commands. <br>*This bug only affects Firefox for Linux on certain Distributions. Other operating syst…