Bug 2530276 (CVE-2026-87485)

Summary: CVE-2026-87485 chromium-browser: Google Chrome: Web origin policy bypass via incorrect CORS authorization
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Google Chrome. This incorrect authorization vulnerability in Cross-Origin Resource Sharing (CORS) allows a remote attacker, who has already compromised the renderer process, to bypass the web origin policy. This bypass is achieved by crafting a malicious HTML page, potentially leading to unauthorized access to resources across different origins.
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Description OSIDB Bzimport 2026-09-09 01:02:44 UTC 
Incorrect authorization in CORS in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)