CVE-2026-4722

HIGH

Firefox < 149 - Privilege Escalation in IPC Component

Title source: llm
STIX 2.1

Description

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

Scores

CVSS v3 8.8
EPSS 0.0002
EPSS Percentile 4.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

Status published
Products (5)
mozilla/firefox < 149.0
Mozilla/Firefox 149
Mozilla/Firefox unspecified - 149
Mozilla/Thunderbird 149
Mozilla/Thunderbird unspecified - 149
Published Mar 24, 2026
Tracked Since Mar 24, 2026