A AegiFlow
CRITICALCVSS 9.1

CVE-2026-84639

CVE-2026-84639 updated by NVD

Modified
2026-09-05
Sources
nvd

Summary

Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

References

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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