CVE-2026-74957 PUBLISHED

Mitigation bypass in the Safe Browsing component

Assigner: mozilla
Reserved: 17.08.2026 Published: 18.08.2026 Updated: 18.08.2026

Mitigation bypass in the Safe Browsing component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Product Status

Vendor Mozilla
Product Firefox
Versions
  • unaffected from 140.14 to 140.* (incl.)
  • unaffected from 153.1 to 153.* (incl.)
  • unaffected from 154 to * (incl.)
Vendor Mozilla
Product Thunderbird
Versions
  • unaffected from 140.14 to 140.* (incl.)
  • unaffected from 153.1 to 153.* (incl.)
  • unaffected from 154 to * (incl.)

Credits

  • Tomoya Nakanishi

References