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CVE PROGRAM SOURCE RECORD8.1 High

CVE-2026-92239

Buffer overrun in IMAP

Description

A maliciously constructed IMAP line could cause an out-of-bounds buffer read. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mozilla Thunderbird

  • 140.16 to ≤ 140.*unaffected
  • 153.3 to ≤ 153.*unaffected
  • 156 to ≤ *unaffected

References