← CVE Intelligence

CVE-2026-103500

Heap buffer overflow opening large email PUBLISHED

Description (CNA)

An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size. This vulnerability was fixed in Thunderbird 157, Thunderbird 140.17, and Thunderbird 153.4.

Affected (CNA)

Vendor / productVersions
Mozilla / Thunderbirdunaffected 140.17 through 140.*; unaffected 153.4 through 153.*; unaffected 157 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.