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CVE-2026-84639

Uninitialized memory in MIME parsing PUBLISHED

Description (CNA)

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.

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.