CVE-2026-84142

Internally found bugs present in Thunderbird 154.

Firefox

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.

1. Sep 2026

Ausgewertete Quellen

• Mozilla
  https://www.mozilla.org/security/advisories/mfsa2026-82/
• Mozilla
  https://www.mozilla.org/security/advisories/mfsa2026-86/
• NVD
  CVE-2026-84142