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cve recordhigh

CVE-2026-84640

mozilla · thunderbird

Published
CVSS7.5
Severityhigh
WeaknessCWE-126
ExploitedNot in CISA KEV

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

A maliciously constructed mail header could lead to a one byte read past the end of a buffer. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

References

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