CVE-2026-121039

Medium CVSS 5.3

Published 2026-11-03 · last changed 2026-11-04

The fix

We hold no Microsoft remediation data for CVE-2026-121039, 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

Incorrect authorization in Proxy Auth in Google Chrome prior to 157.0.8103.38 allowed an adjacent attacker to obtain sensitive information via crafted network traffic. (Chromium security severity: Medium)

Sources

NVD record for CVE-2026-121039

CVSS vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N