CVE-2026-6754 PUBLISHED

Use-after-free in the JavaScript Engine component

Assigner: mozilla
Reserved: 21.04.2026 Published: 21.04.2026 Updated: 21.04.2026

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Product Status

Vendor Mozilla
Product Firefox
Versions
  • unaffected from 115.35 to 115.* (incl.)
  • unaffected from 140.10 to 140.* (incl.)
  • unaffected from 150 to * (incl.)
Vendor Mozilla
Product Thunderbird
Versions
  • unaffected from 140.10 to 140.* (incl.)
  • unaffected from 150 to * (incl.)

Credits

  • Xuehao Guo

References