Vendor
Mozilla
2,453 known vulnerabilities.
Mozilla at a glance
1 of the exploited vulnerabilities are known to be used by ransomware (CISA).
Show as table
| Month | Vulnerabilities | Critical |
|---|---|---|
| Nov 2026 | 1 | 0 |
| Oct 2026 | 269 | 31 |
| Sep 2026 | 191 | 56 |
| Aug 2026 | 60 | 17 |
| Jul 2026 | 71 | 39 |
| Jun 2026 | 50 | 8 |
| May 2026 | 43 | 8 |
| Apr 2026 | 52 | 6 |
| Mar 2026 | 51 | 22 |
| Feb 2026 | 54 | 29 |
| Jan 2026 | 19 | 4 |
| Dec 2025 | 17 | 5 |
| Nov 2025 | 16 | 5 |
| Oct 2025 | 15 | 7 |
| Sep 2025 | 15 | 0 |
| Aug 2025 | 21 | 6 |
| Jul 2025 | 16 | 6 |
| Jun 2025 | 18 | 5 |
| May 2025 | 17 | 1 |
| Apr 2025 | 26 | 1 |
| Mar 2025 | 20 | 3 |
| Feb 2025 | 14 | 7 |
| Jan 2025 | 13 | 1 |
| Dec 2024 | 0 | 0 |
Most common weaknesses
Products
Latest advisories
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High max 9.8
Mozilla Firefox, Firefox ESR, und Thunderbird: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox, Mozilla Firefox ESR und Mozilla Thunderbird ausnutzen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren u…
first Oct 27, 2026 -
High max 9.8
Mozilla Firefox und Thunderbrid: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox und Mozilla Thunderbrid ausnutzen, um seine Privilegien zu erhöhen, Sicherheitsmaßnahmen zu umgehen, Spoofing-Angriffe durchzuführen, Daten offenzulegen oder zu manipulieren, Denial-of-Service-Zustä…
first Oct 13, 2026 -
High max 8.8
Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Mozilla Firefox, Mozilla Firefox ESR und Mozilla Thunderbird ausnutzen, um falsche Informationen darzustellen oder nicht näher spezifizierte Auswirkungen zu verursachen
first Feb 16, 2026 -
High max 10.0
Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox, Firefox ESR und Thunderbird ausnutzen, um seine Privilegien zu erhöhen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Spoofing- oder Clickjacking-Angriffe durchzuführen …
first Aug 18, 2026 -
High max 10.0
Mozilla Firefox und Thunderbird: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox und Thunderbird ausnutzen, um Berechtigungen zu erweitern, Sicherheitsmaßnahmen zu umgehen, sensible Informationen offenzulegen, Daten zu manipulieren, Spoofing-Angriffe durchzuführen, möglicherweis…
first Sep 1, 2026
2,453 results · Feed
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High 8.8
Incorrect boundary conditions in the Layout: Block and Inline component
Incorrect boundary conditions in the Layout: Block and Inline component. This vulnerability was fixed in Firefox 159.0.1.
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High 7.5
Matrix 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 further Matrix request…
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High 8.8
Request 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 server unmodified, so a …
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Critical 9.1
Calendar 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 network attacker when…
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Medium 5.7
RSS 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 attacker able to modify…
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High 8.1
Bypass 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 server chosen by the att…
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High 7.5
Content 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 user sent the message, t…
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Medium 6.5
Displaying 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 arbitrary URL, which Thunderbi…
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Critical 9.1
Frame poisoning in the Layout component
Frame poisoning in the Layout component. This vulnerability was fixed in Firefox ESR 115.44.
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High 8.8
Invalid pointer in the JavaScript: GC component
Invalid pointer in the JavaScript: GC component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
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High 8.8
Other issue in the SVG component
Other issue in the SVG component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
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High 8.8
Use-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.
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High 8.8
Sandbox 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.
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High 8.8
Sandbox 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.
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High 8.8
Sandbox 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.
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High 8.8
Use-after-free in the Layout component
Use-after-free in the Layout component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
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High 8.8
Race 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.
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High 8.8
Spoofing 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.
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High 8.8
Use-after-free in the SVG component
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
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High 8.8
Use-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.
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High 8.8
Use-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.
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High 8.8
Use-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.
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High 8.8
Use-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.
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High 8.8
Use-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.
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High 8.8
Frame 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.
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High 8.8
Use-after-free in the Disability Access APIs component
Use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
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High 8.8
Privilege escalation in the DOM: Navigation component
Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
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High 8.8
Integer 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.
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High 8.8
Use-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.
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High 8.8
Privilege escalation due to use-after-free in the WebRTC: Signaling component
Privilege escalation due to use-after-free in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
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High 8.8
Use-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.
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High 8.1
Incorrect boundary conditions in the CSS Transitions and Animations component
Incorrect boundary conditions in the CSS Transitions and Animations component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
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High 8.1
Information disclosure in the Networking: DNS component
Information disclosure in the Networking: DNS component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
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High 8.1
Information disclosure due to race condition in the Networking component
Information disclosure due to race condition in the Networking component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
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High 8.1
Information disclosure in the Networking: HTTP component
Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
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High 8.8
Race 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.
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High 8.8
Mitigation bypass in the DOM: Push Subscriptions component
Mitigation bypass in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
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Critical 9.6
Sandbox escape due to use-after-free in the Widget component
Sandbox escape due to use-after-free in the Widget component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
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High 8.1
Incorrect boundary conditions in the WebRTC component
Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
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High 8.8
Privilege escalation in the DOM: UI Events & Focus Handling component
Privilege escalation in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.