Bug 2530467 (CVE-2026-87521)

Summary: CVE-2026-87521 chromium-browser: Chromium: Information leak in WebMCP allows cross-origin data access
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in WebMCP in Chromium. A remote attacker, after compromising the renderer process, could exploit this vulnerability by crafting a malicious HTML page. This could lead to an information leak, allowing the attacker to obtain sensitive cross-origin data.
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Description OSIDB Bzimport 2026-09-09 01:16:08 UTC
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)