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thunderbird vulnerabilities · Page 18

Vulnerabilities published for thunderbird in the last 30 days: 263. Listed in the KEV catalogue: 0.

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Vulnerabilities: 1304

  1. CVE-2026-92240

    Critical · CVSS 9.1EPSS 0.63%No fix published

    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.

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