CVE-2026-84145

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 155 Firefox ESR versions prior to 115.40 Firefox ESR versions prior to 140.15 Firefox ESR versions prior to 153.2 Thunderbird versions prior to 155 Thunderbird ESR versions prior to 140.15 Thunderbird ESR versions prior to 153.2

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 version 155. Update Firefox ESR to version 115.40. Update Firefox ESR to version 140.15. Update Firefox ESR to version 153.2. Update Thunderbird to version 155. Update Thunderbird ESR to version 140.15. Update Thunderbird ESR to version 153.2.