CVE-2026-117928 PUBLISHED

Same-origin policy bypass in the CSS Parsing and Computation component

Assigner: mozilla
Reserved: 27.10.2026 Published: 27.10.2026 Updated: 27.10.2026

Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Product Status

Vendor Mozilla
Product Firefox
Versions
  • unaffected from 153.6 to 153.* (incl.)
  • unaffected from 159 to * (incl.)
Vendor Mozilla
Product Thunderbird
Versions
  • unaffected from 153.6 to 153.* (incl.)
  • unaffected from 159 to * (incl.)

Credits

  • Minseong Kim

References