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thunderbird vulnerabilities · Page 25

Vulnerabilities published for thunderbird in the last 30 days: 216. Listed in the KEV catalogue: 0.

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Vulnerabilities: 1344

  1. CVE-2026-6749

    High · CVSS 7.5EPSS 0.4%Fix available

    Information disclosure due to uninitialized memory in the Graphics: Canvas2D component

    Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    • Update to 1:140.10.0esr-1
    Published Updated
  2. CVE-2026-5734

    High · CVSS 8.1EPSS 0.33%Fix available

    Memory safety bugs fixed in Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2

    Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. 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 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.

    • Update to 1:140.9.1esr-1
    Published Updated

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