CVE-2026-87521 Information disclosure in Chrome

What is CVE-2026-87521?

CVE-2026-87521 is a low-severity vulnerability in Google Chrome, published on 9 Sep 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

Information leak in WebMCP in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)

Weakness: CWE-200

Which versions are affected by CVE-2026-87521?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2026-87521?

Upgrade to a fixed version.

Is CVE-2026-87521 being exploited?

There is no known exploitation of CVE-2026-87521 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-2026-87521, ECHO-4879-6f24-9454, GHSA-cxvg-jqm2-2qpv, MINI-w95x-98rj-j6f7.