Mozilla Firefox Use-After-Free Vulnerability

Added to KEV
2022-03-07
Federal due date
2022-03-21
Vendor
Mozilla
Product
Firefox
EPSS
85.7th percentile (score 0.025, as of 2026-06-08)
NVD CVSS v3.1
Ransomware use
Unknown
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2022-26486

CISA short description

Mozilla Firefox contains a use-after-free vulnerability in WebGPU IPC Framework which can be exploited to perform arbitrary code execution.

Required action

Apply updates per vendor instructions.

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.