EUVD-2026-60699

Internally found bugs present in Thunderbird ESR 153.0 and Thunderbird 153. 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 154,...

PT-2026-77022

Name of the Vulnerable Software and Affected Versions Firefox version 153 Thunderbird version 153 Description Internal bugs were identified that exhibit evidence of memory corruption or other security-relevant defects, which could potentially be exploited. Recommendations Update Firefox to versio...