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thunderbird vulnerabilities · Page 25

Vulnerabilities published for thunderbird in the last 30 days: 258. Listed in the KEV catalogue: 0.

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Vulnerabilities: 1303

  1. CVE-2026-4690

    Critical · CVSS 9.6EPSS 0.8%Fix available

    Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component

    Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

    • Update to 1:140.9.0esr-1~deb13u1
    Published Updated
  2. CVE-2026-4689

    Critical · CVSS 10EPSS 0.69%Fix available

    Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component

    Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

    • Update to 1:140.9.0esr-1~deb13u1
    Published Updated
  3. CVE-2026-4687

    Critical · CVSS 9.6EPSS 0.56%Fix available

    Sandbox escape due to incorrect boundary conditions in the Telemetry component

    Sandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

    • Update to 1:140.9.0esr-1~deb13u1
    Published Updated
  4. CVE-2026-2793

    Critical · CVSS 9.8EPSS 0.38%Fix available

    Memory safety bugs fixed in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148

    Memory safety bugs present in Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. 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 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

    • Update to 1:140.8.0esr-1~deb13u1
    Published Updated
  5. CVE-2026-2792

    Critical · CVSS 9.8EPSS 0.38%Fix available

    Memory safety bugs fixed in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148

    Memory safety bugs present in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. 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 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

    • Update to 1:140.8.0esr-1~deb13u1
    Published Updated

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