CVE-2026-106253 Missing authorization in Chrome

What is CVE-2026-106253?

CVE-2026-106253 is a medium-severity missing authorization vulnerability in Google Chrome, published on 6 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Incorrect authorization in Extensions in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to obtain cross-origin data via a crafted Chrome extension. (Chromium security severity: Medium)

Weakness: CWE-863

Which versions are affected by CVE-2026-106253?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2026-106253?

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-2026-106253 being exploited?

There is no known exploitation of CVE-2026-106253 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-2026-106253, ECHO-406b-f66d-ef7f, GHSA-38pg-jw2j-v927, MINI-qh8m-29hm-52xw.