← CVE Intelligence

CVE-2026-84640

One byte overflow read in mail parser PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Mozilla / Thunderbirdunaffected 140.15 through 140.*; unaffected 153.2 through 153.*; unaffected 155 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.