CVE-2026-9939
8.8
HIGH
CVSS 3.1
EPSS 0.41%
Description
Heap buffer overflow in WebCodecs in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
How to fix CVE-2026-9939
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/chromium—no fix listed
Is CVE-2026-9939 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |