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CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-84142

Internally found bugs fixed in Thunderbird 155

Description

Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155 and Thunderbird 155.

Affected products

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

Mozilla Firefox

  • 155 to ≤ *unaffected

Mozilla Thunderbird

  • 155 to ≤ *unaffected

References