CVE-2026-106271 Missing authorization in Chrome

What is CVE-2026-106271?

CVE-2026-106271 is a high-severity missing authorization vulnerability in Google Chrome, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Missing authorization in Workers in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted PDF file. (Chromium security severity: Medium)

Weakness: CWE-862

Which versions are affected by CVE-2026-106271?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2026-106271?

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-2026-106271 being exploited?

There is no known exploitation of CVE-2026-106271 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-2026-106271, ECHO-5995-9c8b-7936, GHSA-wjrv-mx5h-7hf3, MINI-7rj6-3vm8-6ph7.