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thunderbird vulnerabilities · Page 5

Vulnerabilities published for thunderbird in the last 30 days: 127. Listed in the KEV catalogue: 0.

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Vulnerabilities: 1193

  1. CVE-2026-100811

    Critical · CVSS 9.6EPSS 0.27%Fix available

    Sandbox escape due to use-after-free in the DOM: Core & HTML component

    Sandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.

    • Update to 1:153.4.0esr-1
    Published Updated
  2. CVE-2026-100797

    High · CVSS 8.8EPSS 0.25%Fix available

    Privilege escalation due to use-after-free in the Graphics: WebRender component

    Privilege escalation due to use-after-free in the Graphics: WebRender component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

    • Update to 1:153.4.0esr-1
    Published Updated
  3. CVE-2026-100794

    Critical · CVSS 9.6EPSS 0.32%Fix available

    Sandbox escape due to incorrect boundary conditions in the Internationalization component

    Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.

    • Update to 1:153.4.0esr-1
    Published Updated

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