CVE-2026-17821 Security feature bypass in Chrome

What is CVE-2026-17821?

CVE-2026-17821 is a medium-severity vulnerability in Google Chrome, published on 30 Jul 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

Insufficient policy enforcement in Extensions in Google Chrome prior to 151.0.7922.72 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a crafted Chrome Extension. (Chromium security severity: Medium)

Weakness: CWE-602

Which versions are affected by CVE-2026-17821?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2026-17821?

Upgrade to a fixed version.

Is CVE-2026-17821 being exploited?

There is no known exploitation of CVE-2026-17821 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-2026-17821, ECHO-1a9a-3a4d-d022, GHSA-9c37-rj77-8q8m, MINI-2gcg-66v9-r955.