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thunderbird vulnerabilities · Page 7

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

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Vulnerabilities: 1193

  1. CVE-2026-100762

    Critical · CVSS 9.6EPSS 0.32%Fix available

    Sandbox escape due to use-after-free in the DOM: Content Processes component

    Sandbox escape due to use-after-free in the DOM: Content Processes 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-2026-100759

    High · CVSS 8.1EPSS 0.31%Fix available

    Uninitialized memory in the Storage: Quota Manager component

    Uninitialized memory in the Storage: Quota Manager 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-2026-100756

    High · CVSS 8.1EPSS 0.31%Fix available

    Incorrect boundary conditions in the Audio/Video: Playback component

    Incorrect boundary conditions in the Audio/Video: Playback 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
  4. CVE-2026-92240

    Critical · CVSS 9.1EPSS 0.63%Fix available

    Out-of-bounds read in IMAP response parser

    A malicious or compromised IMAP server can trigger an out-of-bounds read in the IMAP response parser by sending an untagged '* ID' response, crashing Thunderbird. The affected parsing path is reachable before authentication. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

    • Update to 1:153.3.0esr-1
    Published Updated

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