Bug 2530405 (CVE-2026-87580)

Summary: CVE-2026-87580 chromium-browser: Google Chrome: Site Isolation Bypass via Incorrect Authorization
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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Hardware: All   
OS: Linux   
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A flaw was found in Google Chrome. An incorrect authorization vulnerability in WebAppInstalls could allow a remote attacker to bypass site isolation. This exploitation requires the attacker to first compromise the renderer process and then leverage social engineering through a crafted HTML page. The primary consequence is the circumvention of site isolation, which could lead to unauthorized access to sensitive information or further system compromise.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2542201, 2542202, 2542206    
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Description OSIDB Bzimport 2026-09-09 01:12:29 UTC 
Incorrect authorization in WebAppInstalls in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)