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firefox vulnerabilities

Vulnerabilities published for firefox in the last 30 days: 0. Listed in the KEV catalogue: 0.

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Vulnerabilities: 714

  1. CVE-2025-1943

    High · CVSS 8.2EPSS 0.43%Fix available

    Memory safety bugs fixed in Firefox 136 and Thunderbird 136

    Memory safety bugs present in Firefox 135 and Thunderbird 135. 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 was fixed in Firefox 136 and Thunderbird 136.

    • Update to 136.0+build3-0ubuntu0.20.04.1
    Published Updated
  2. CVE-2025-1938

    Medium · CVSS 6.5EPSS 0.34%Fix available

    Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8

    Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. 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 was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

    • Update to 136.0+build3-0ubuntu0.20.04.1
    Published Updated
  3. CVE-2025-1937

    High · CVSS 7.5EPSS 0.56%Fix available

    Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8

    Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. 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 was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

    • Update to 136.0+build3-0ubuntu0.20.04.1
    Published Updated
  4. CVE-2025-1936

    High · CVSS 7.3EPSS 0.45%Fix available

    Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents

    jar: URLs retrieve local file content packaged in a ZIP archive. The null and everything after it was ignored when retrieving the content from the archive, but the fake extension after the null was used to determine the type of content. This could have been used to hide code in a web extension disguised as something else like an image. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

    • Update to 136.0+build3-0ubuntu0.20.04.1
    Published Updated
  5. CVE-2025-1942

    Critical · CVSS 9.8EPSS 0.48%Fix available

    Disclosure of uninitialized memory when .toUpperCase() causes string to get longer

    When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string. This vulnerability was fixed in Firefox 136 and Thunderbird 136.

    • Update to 136.0+build3-0ubuntu0.20.04.1
    Published Updated
  6. CVE-2025-1934

    Medium · CVSS 6.5EPSS 0.45%Fix available

    Unexpected GC during RegExp bailout processing

    It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

    • Update to 136.0+build3-0ubuntu0.20.04.1
    Published Updated
  7. CVE-2025-1933

    High · CVSS 7.6EPSS 0.32%Fix available

    JIT corruption of WASM i32 return values on 64-bit CPUs

    On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

    • Update to 136.0+build3-0ubuntu0.20.04.1
    Published Updated
  8. CVE-2025-1932

    High · CVSS 8.1EPSS 0.42%Fix available

    Inconsistent comparator in XSLT sorting led to out-of-bounds access

    An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-bounds access. Only affected version 122 and later. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

    • Update to 136.0+build3-0ubuntu0.20.04.1
    Published Updated
  9. CVE-2025-1931

    High · CVSS 7.5EPSS 0.54%Fix available

    Use-after-free in WebTransportChild

    It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

    • Update to 136.0+build3-0ubuntu0.20.04.1
    Published Updated
  10. CVE-2025-1414

    Medium · CVSS 6.5EPSS 0.45%Fix available

    Memory safety bugs fixed in Firefox 135.0.1

    Memory safety bugs present in Firefox 135. 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 was fixed in Firefox 135.0.1.

    • Update to 136.0+build3-0ubuntu0.20.04.1
    Published Updated
  11. CVE-2025-1020

    Critical · CVSS 9.8EPSS 0.54%Fix available

    Memory safety bugs fixed in Firefox 135 and Thunderbird 135

    Memory safety bugs present in Firefox 134 and Thunderbird 134. 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 was fixed in Firefox 135 and Thunderbird 135.

    • Update to 135.0+build2-0ubuntu0.20.04.1
    Published Updated
  12. CVE-2025-1017

    Critical · CVSS 9.8EPSS 0.58%Fix available

    Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7

    Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6. 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 was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

    • Update to 135.0+build2-0ubuntu0.20.04.1
    Published Updated
  13. CVE-2025-1016

    Critical · CVSS 9.8EPSS 0.59%Fix available

    Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 115.20, and Thunderbird 128.7

    Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6. 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 was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

    • Update to 135.0+build2-0ubuntu0.20.04.1
    Published Updated
  14. CVE-2025-1013

    Medium · CVSS 6.5EPSS 0.33%Fix available

    Potential opening of private browsing tabs in normal browsing windows

    A race condition could have led to private browsing tabs being opened in normal browsing windows. This could have resulted in a potential privacy leak. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

    • Update to 135.0+build2-0ubuntu0.20.04.1
    Published Updated
  15. CVE-2025-1011

    Critical · CVSS 9.8EPSS 0.63%Fix available

    A bug in WebAssembly code generation could result in a crash

    A bug in WebAssembly code generation could have lead to a crash. It may have been possible for an attacker to leverage this to achieve code execution. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

    • Update to 135.0+build2-0ubuntu0.20.04.1
    Published Updated
  16. CVE-2025-1018

    High · CVSS 7.3EPSS 0.42%Fix available

    Fullscreen notification is not displayed when fullscreen is re-requested

    The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.

    • Update to 135.0+build2-0ubuntu0.20.04.1
    Published Updated

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