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firefox-esr vulnerabilities · Page 31

Vulnerabilities published for firefox-esr in the last 30 days: 206. Listed in the KEV catalogue: 0.

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Vulnerabilities: 1349

  1. CVE-2025-4083

    Critical · CVSS 9.1EPSS 0.46%Fix available

    Process isolation bypass using "javascript:" URI links in cross-origin frames

    A process isolation vulnerability in Thunderbird stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended frame, potentially enabling a sandbox escape. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10.

    • Update to 128.10.0esr-1
    Published Updated
  2. CVE-2025-3030

    High · CVSS 8.1EPSS 0.51%Fix available

    Memory safety bugs fixed in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9

    Memory safety bugs present in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8. 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 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.

    • Update to 128.9.0esr-1
    Published Updated
  3. CVE-2025-3029

    High · CVSS 7.3EPSS 0.36%Fix available

    URL Bar Spoofing via non-BMP Unicode characters

    A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability was fixed in Firefox 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.

    • Update to 128.9.0esr-1
    Published Updated
  4. 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 128.8.0esr-1
    Published Updated
  5. 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 128.8.0esr-1
    Published Updated
  6. 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 128.8.0esr-1
    Published Updated
  7. 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 128.8.0esr-1
    Published Updated
  8. 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 128.8.0esr-1
    Published Updated
  9. 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 128.8.0esr-1
    Published Updated
  10. 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 128.8.0esr-1
    Published Updated
  11. 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 128.7.0esr-1
    Published Updated
  12. 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 128.7.0esr-1
    Published Updated
  13. 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 128.7.0esr-1
    Published Updated
  14. 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 128.7.0esr-1
    Published Updated

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