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thunderbird vulnerabilities · Page 4

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

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Vulnerabilities: 1193

  1. CVE-2026-100821

    Medium · CVSS 4.7EPSS 0.14%Fix available

    Site isolation issue in the Panning and Zooming component

    Site isolation issue in the Panning and Zooming 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
  2. CVE-2026-100819

    Critical · CVSS 9.6EPSS 0.26%Fix available

    Sandbox escape due to incorrect boundary conditions in the XPCOM component

    Sandbox escape due to incorrect boundary conditions in the XPCOM 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-2026-100818

    Critical · CVSS 9.6EPSS 0.27%Fix available

    Sandbox escape due to use-after-free in the Widget: Gtk component

    Sandbox escape due to use-after-free in the Widget: Gtk 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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