CVE-2026-121242

Unrated

Published 2026-11-03 · last changed 2026-11-03

The fix

We hold no Microsoft remediation data for CVE-2026-121242, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

Improper input validation in WebPackaging in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via crafted network traffic. (Chromium security severity: Medium)

Sources

NVD record for CVE-2026-121242