Mozilla has 710 CVEs on record between 2016 and 2026. Disclosure cadence is accelerating: 428 in the last 90 days against 67 in the 90 before. The busiest recent month was October 2026 with 265. The median CVSS is 8.1 (high), with 115 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 (653), 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
- 428 prev 67
Weakness classes
Products
- Firefox 653
- 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.
710 CVEsRSS
CVE-2026-118178NoneRSS feed could redirect its subscription to a local file or network share
A remote RSS feed could use the itunes:new-feed-url or newLocation element to permanently change its stored subscription URL to a file: URL. Thunderbird then read that location on every feed update. This allowed a malicious feed, or an a…
CVE-2026-118175NoneContent of other messages could be included when replying to a crafted message
When replying to, forwarding, or editing a crafted email message as new, Thunderbird could embed parts of a different message stored in the same folder into the message being composed, without showing a blocked content warning. If the us…
CVE-2026-118174NoneDisplaying a message could load an attacker-chosen URL through an OpenPGP key attachment
When a message containing an OpenPGP key attachment was displayed, Thunderbird automatically loaded the attachment's content to offer importing the key. A sender could mark the attachment as an external attachment pointing to an arbitrar…
CVE-2026-118177NoneCalendar discovery accepted local file and remote network share locations
When looking for calendars in a directory on a server, during account setup or when adding a new network calendar, Thunderbird accepted calendar locations pointing to other servers, local files or network shares. A malicious server, or a…
CVE-2026-118180NoneMatrix homeserver could redirect the chat session to a local file or network share
When logging in to a Matrix account, Thunderbird used the homeserver address provided in the server's login response without validating it. A malicious or compromised homeserver could provide a file: URL, causing Thunderbird to send all …
CVE-2026-118176NoneBypass of remote UNC path restriction in mailbox: URLs
Thunderbird's check that prevents mailbox: URLs from accessing files on remote Windows network shares could be bypassed using extended-length UNC paths. Displaying a specially crafted email could cause Thunderbird to connect to an SMB se…
CVE-2026-118179NoneRequest forgery via news: links
Clicking a news: or snews: link that referenced a message-ID made Thunderbird connect, without asking, to the host and port given in the link, even if it was not a configured news server. Line breaks in the message-ID were sent to the se…
CVE-2026-118008High· 8.8Privilege escalation in the DOM: Navigation component
Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-117999NoneRace condition in the IPC component
Race condition in the IPC component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
CVE-2026-117976NoneSite isolation issue in the DOM: Navigation component
Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
CVE-2026-118027NoneFrame poisoning in the Layout component
Frame poisoning in the Layout component. This vulnerability was fixed in Firefox ESR 115.44.
CVE-2026-118024NoneUse-after-free in the Graphics: Text component
Use-after-free in the Graphics: Text component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118026NoneInvalid pointer in the JavaScript: GC component
Invalid pointer in the JavaScript: GC component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118025NoneOther issue in the SVG component
Other issue in the SVG component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118022NoneSandbox escape due to use-after-free in the Disability Access APIs component
Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118021NoneSandbox escape due to use-after-free in the XPCOM component
Sandbox escape due to use-after-free in the XPCOM component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118023NoneSandbox escape due to use-after-free in the Graphics: WebRender component
Sandbox escape due to use-after-free in the Graphics: WebRender component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118018NoneSpoofing issue in the Downloads component in Firefox for Android
Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 159.
CVE-2026-118020NoneUse-after-free in the Layout component
Use-after-free in the Layout component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118016NoneUse-after-free in the DOM: Core & HTML component
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118019NoneRace condition, use-after-free in the DOM: File component
Race condition, use-after-free in the DOM: File component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118017NoneUse-after-free in the SVG component
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118012NoneUse-after-free in the DOM: Animation component
Use-after-free in the DOM: Animation component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118011NoneFrame poisoning in the CSS Parsing and Computation component
Frame poisoning in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118014NoneUse-after-free in the JavaScript Engine: JIT component
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118013NoneUse-after-free in the Layout: Images, Video, and HTML Frames component
Use-after-free in the Layout: Images, Video, and HTML Frames component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118015NoneUse-after-free in the DOM: Core & HTML component
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118009NoneInteger overflow, use-after-free in the Graphics: Text component
Integer overflow, use-after-free in the Graphics: Text component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118007NoneUse-after-free in the JavaScript: GC component
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
CVE-2026-118005NoneUse-after-free in the WebRTC: Signaling component
Use-after-free in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.