Firefox ESR at a glance
1 of the exploited vulnerabilities are known to be used by ransomware (CISA).
Show as table
| Month | Vulnerabilities | Critical |
|---|---|---|
| Nov 2026 | 0 | 0 |
| Oct 2026 | 0 | 0 |
| Sep 2026 | 0 | 0 |
| Aug 2026 | 0 | 0 |
| Jul 2026 | 0 | 0 |
| Jun 2026 | 0 | 0 |
| May 2026 | 0 | 0 |
| Apr 2026 | 0 | 0 |
| Mar 2026 | 0 | 0 |
| Feb 2026 | 0 | 0 |
| Jan 2026 | 0 | 0 |
| Dec 2025 | 0 | 0 |
| Nov 2025 | 0 | 0 |
| Oct 2025 | 0 | 0 |
| Sep 2025 | 0 | 0 |
| Aug 2025 | 0 | 0 |
| Jul 2025 | 0 | 0 |
| Jun 2025 | 0 | 0 |
| May 2025 | 0 | 0 |
| Apr 2025 | 0 | 0 |
| Mar 2025 | 0 | 0 |
| Feb 2025 | 0 | 0 |
| Jan 2025 | 0 | 0 |
| Dec 2024 | 0 | 0 |
Most common weaknesses
Latest advisories
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High max 9.6
Mozilla Firefox und Thunderbird: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox und Mozilla Thunderbird ausnutzen, um Sicherheitsmaßnahmen zu umgehen, erhöhte Berechtigungen zu erlangen, Dateien zu manipulieren, Informationen auszulesen oder nicht näher spezifizierte Angriffe d…
first Nov 10, 2026 -
High max 9.8
Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox ESR, Mozilla Firefox und Thunderbird ausnutzen, um beliebigen Programmcode auszuführen, Berechtigungen zu erweitern, Sicherheitsmaßnahmen zu umgehen, Daten offenzulegen oder zu manipulieren, einen D…
first Sep 29, 2026 -
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 9.8
Mozilla Thunderbird, Firefox ESR und Firefox: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Mozilla Thunderbird, Mozilla Firefox ESR und Mozilla Firefox ausnutzen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um falsche Informationen dar…
first Apr 21, 2026
712 results · Feed
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High 8.8
Memory safety bugs present in Firefox 132, Firefox ESR 128.4, and Thunderbird 128.4. Some of these bugs showed evidence…
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Critical 9.8
A flaw in handling fullscreen transitions may have inadvertently caused the application to become stuck in fullscreen m…
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High 8.8
When handling keypress events, an attacker may have been able to trick a user into bypassing the "Open Executable File?…
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Critical 9.8
A double-free issue could have occurred in `sec_pkcs7_decoder_start_decrypt()` when handling an error path. Under speci…
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Medium 5.4
The application failed to account for exceptions thrown by the `loadManifestFromFile` method during add-on signature ve…
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Medium 5.4
A crafted URL containing Arabic script and whitespace characters could have hidden the true origin of the page, resulti…
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Medium 6.1
Enhanced Tracking Protection's Strict mode may have inadvertently allowed a CSP `frame-src` bypass and DOM-based XSS th…
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Critical 9.8
The executable file warning was not presented when downloading .library-ms files. *Note: This issue only affected Windo…
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Medium 4.3
An attacker could cause a select dropdown to be shown over another tab; this could have led to user confusion and possi…
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High 8.8
Certain WebGL operations on Apple silicon M series devices could have lead to an out-of-bounds write and memory corrupt…
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Critical 9.8
Memory safety bugs present in Firefox 131, Firefox ESR 128.3, and Thunderbird 128.3. Some of these bugs showed evidence…
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High 7.5
By sending a specially crafted push message, a remote server could have hung the parent process, causing the browser to…
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High 7.5
A clipboard "paste" button could persist across tabs which allowed a spoofing attack. This vulnerability affects Firefo…
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High 7.5
Repeated writes to history interface attributes could have been used to cause a Denial of Service condition in the brow…
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High 7.5
Video frames could have been leaked between origins in some situations. This vulnerability affects Firefox < 132, Firef…
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High 7.5
Truncation of a long URL could have allowed origin spoofing in a permission prompt. This vulnerability affects Firefox …
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Medium 6.1
In multipart/x-mixed-replace responses, `Content-Disposition: attachment` in the response header was not respected and …
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Medium 5.4
The origin of an external protocol handler prompt could have been obscured using a data: URL within an `iframe`. This v…
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Medium 6.5
An attacker could have caused a use-after-free when accessibility was enabled, leading to a potentially exploitable cra…
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Medium 6.5
A permission leak could have occurred from a trusted site to an untrusted site via `embed` or `object` elements. This v…
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Critical 9.8
An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timel…
KEV Oct 15, 2024 -
Critical 9.8
Memory safety bugs present in Firefox 130, Firefox ESR 115.15, Firefox ESR 128.2, and Thunderbird 128.2. Some of these …
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Critical 9.8
Memory safety bugs present in Firefox 130, Firefox ESR 128.2, and Thunderbird 128.2. Some of these bugs showed evidence…
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High 7.5
A website configured to initiate a specially crafted WebTransport session could crash the Firefox process leading to a …
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High 8.8
A potential memory corruption vulnerability could be triggered if an attacker had the ability to trigger an OOM at a sp…
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Medium 6.1
A missing delay in directory upload UI could have made it possible for an attacker to trick a user into granting permis…
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Medium 5.3
By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine i…
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High 8.8
It is currently unknown if this issue is exploitable but a condition may arise where the structured clone of certain ob…
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Medium 6.1
An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://devto…
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High 7.5
An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://pdf.j…
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Critical 9.8
A compromised content process could have allowed for the arbitrary loading of cross-origin pages. This vulnerability af…
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High 7.5
An attacker could write data to the user's clipboard, bypassing the user prompt, during a certain sequence of navigatio…
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High 7.5
Type Confusion in Async Generators in Javascript Engine
An error in the ECMA-262 specification relating to Async Generators could have resulted in a type confusion, potentially leading to memory corruption and an exploitable crash. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.1…
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Critical 9.8
Memory safety bugs present in Firefox 129, Firefox ESR 128.1, and Thunderbird 128.1. Some of these bugs showed evidence…
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Medium 6.1
If a site had been granted the permission to open popup windows, it could cause Select elements to appear on top of ano…
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High 7.5
Firefox normally asks for confirmation before asking the operating system to find an application to handle a scheme tha…
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Critical 9.8
A difference in the handling of StructFields and ArrayTypes in WASM could be used to trigger an exploitable type confus…
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Critical 9.8
The JavaScript garbage collector could mis-color cross-compartment objects if OOM conditions were detected at the right…
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High 8.8
Internal browser event interfaces were exposed to web content when privileged EventHandler listener callbacks ran for t…
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Critical 9.8CVE-2024-8381 Public exploit
A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as …