CVE-2026-84121

CRITICAL9.6

Published 2026-09-01 · Updated 2026-09-01 · Source security@mozilla.org

Description

Sandbox escape due to use-after-free in the DOM: Security component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CWE-416

References

View on NVD

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