CVE-2026-74990

Name of the Vulnerable Software and Affected Versions Firefox ESR version 115.38 Firefox ESR version 140.13 Firefox ESR version 153.0 Firefox version 153 Thunderbird ESR version 140.13 Thunderbird ESR version 153.0 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 ESR 115.38 to version 115.39. Update Firefox ESR 140.13 to version 140.14. Update Firefox ESR 153.0 to version 153.1. Update Firefox 153 to version 154. Update Thunderbird ESR 140.13 to version 140.14. Update Thunderbird ESR 153.0 to version 153.1. Update Thunderbird 153 to version 154.