As cited
Copy frozen at (site build).
vulnerabilities
Mozilla security advisory (AV26-1057)
Mozilla released security updates for Firefox, Firefox ESR, and Thunderbird as of October 13, 2026, addressing multiple vulnerabilities across multiple product versions. Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5 contain patches for these issues. Users and administrators are advised to review Mozilla's security advisories and apply updates.
Why it matters: Firefox and Thunderbird users need to update immediately to the patched versions (Firefox 158, ESR 153.5, Thunderbird 158, or 153.5) to remediate active vulnerabilities in widely deployed software.
- Source published
- First seen by Cybersecurity Tracker