CVE-2026-74956

CVE-2026-74956CVE-2026-74956

mozilla / firefox

Description

Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

Scoring

CVSS 9.1 ()
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Last modified2026-08-19
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.