CVE-2026-92240

Critical · CVSS 9.1

CVSS: 9.1; nvd
EPSS: 0.69%; 51th pct
KEV: No
Class: other; CWE-125

Description

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.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2069113
https://www.mozilla.org/security/advisories/mfsa2026-94/
https://www.mozilla.org/security/advisories/mfsa2026-95/
https://www.mozilla.org/security/advisories/mfsa2026-96/

Status: profiled · ingested 2026-09-24T18:00:19.000Z