CVE-2026-4722

high

Description

Privilege escalation in the IPC component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

References

https://www.mozilla.org/security/advisories/mfsa2026-23/

https://www.mozilla.org/security/advisories/mfsa2026-20/

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-14859

https://bugzilla.mozilla.org/show_bug.cgi?id=2010097

Details

Source: Mitre, NVD

Published: 2026-03-24

Updated: 2026-04-13

Named Vulnerability: GHSA-fmr6-7878-wx6p

Risk Information

CVSS v2

Base Score: 10

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

Severity: Critical

CVSS v3

Base Score: 8.8

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

Severity: High

EPSS

EPSS: 0.00434