CVE-2026-6763

critical

Description

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.

References

https://www.mozilla.org/security/advisories/mfsa2026-32/

https://www.mozilla.org/security/advisories/mfsa2026-30/

https://bugzilla.mozilla.org/show_bug.cgi?id=2021666

Details

Source: Mitre, NVD

Published: 2026-04-21

Updated: 2026-04-21

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical