CVE-2026-87431 Missing authorization in Chrome

What is CVE-2026-87431?

CVE-2026-87431 is a high-severity missing authorization vulnerability in Google Chrome, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Missing authorization in Extensions in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to obtain sensitive information via a crafted Chrome extension. (Chromium security severity: Medium)

Weakness: CWE-862

Which versions are affected by CVE-2026-87431?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2026-87431?

Upgrade to a fixed version.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-87431 being exploited?

There is no known exploitation of CVE-2026-87431 in the wild and no public exploit code.

Other vulnerabilities in Google Chrome

• CVE-2022-4135 Google Chromium GPU Heap Buffer Overflow Exploited Critical 9.6
• CVE-2020-16017 Google Chrome Use-After-Free Exploited Critical 9.6
• CVE-2020-16010 Google Chrome for Android UI Heap Buffer Overflow Exploited Critical 9.6
• CVE-2026-87491 Google Chromium V8 Out of Bounds Write Exploited High 8.8
• CVE-2026-85046 Google Chromium V8 Type Confusion Exploited High 8.8

All Google Chrome vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-87431, ECHO-c17e-c951-71ea, GHSA-6973-j353-j588, MINI-ff9h-6pg2-m6hp.