CVE-2026-121085: Incorrect authorization in WebUI

Published Sep 16, 2026
·
Updated

Incorrect authorization in WebUI in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass system access restrictions into a privileged page via a crafted HTML page. (Chromium security severity: Low)

Credit

Google

Affected Software

5 affected componentsFixes available
Google Chrome<157.0.8103.38
157.0.8103.38
debian/chromium*
debian/chromium*
debian/chromium*
debian/chromium<=150.0.7871.100-1~deb12u1, <=156.0.8078.79-1~deb12u1, <=150.0.7871.181-1~deb13u1, <=156.0.8078.79-1~deb13u1, <=156.0.8078.47-1, <=156.0.8078.79-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 157.0.8103.38
  2. Upgrade

    Upgrade Google Chrome to a version that resolves this vulnerability.

    Fixed in 157.0.8103.38

Event History

Sep 16, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
Nov 3, 2026
CVE Published
via MITRE·08:42 PM
Data Sourced
via MITRE·08:42 PM
DescriptionWeakness
Data Sourced
via NVD·09:17 PM
DescriptionWeakness
Data Sourced
via OSV·09:17 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What does an attacker need to exploit this issue?

The attacker needs to induce a user to load a crafted HTML page remotely. The issue can then bypass system access restrictions for a privileged WebUI page.

2

Which versions are affected?

Google Chrome versions prior to 157.0.8103.38 are affected. The listed software also includes Debian's Chromium package, but no Debian package version is provided.

3

How can I mitigate the issue if I cannot update immediately?

Avoid opening untrusted HTML pages or visiting untrusted websites, since exploitation requires a crafted HTML page. Updating to Chrome 157.0.8103.38 or later is the available remediation indicated by the data.

Company

Resources

Contact

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