Bug 2530469 (CVE-2026-87436)

Summary: CVE-2026-87436 chromium-browser: Chromium: Web origin policy bypass via crafted extension
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: urgent Docs Contact:
Priority: urgent    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Chromium. A remote attacker, leveraging social engineering, could exploit an incomplete cleanup vulnerability in the browser. This could allow the attacker to bypass the web origin policy through a specially crafted extension, potentially leading to unauthorized access to sensitive information or actions.
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Description OSIDB Bzimport 2026-09-09 01:16:14 UTC
Incomplete cleanup in Browser in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass web origin policy via a crafted Chrome extension. (Chromium security severity: Medium)