CVE-2026-117976 PUBLISHED

Site isolation issue in the DOM: Navigation component

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

Site isolation issue in the DOM: Navigation 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

  • Shu Takahashi of Velcore Consulting Inc.

References