Bug 2530403 (CVE-2026-87551)

Summary: CVE-2026-87551 chromium-browser: chromium-browser: Web origin policy bypass via improper certificate validation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in chromium-browser. This vulnerability involves improper certificate validation within the Cross-Origin Resource Sharing (CORS) mechanism. A remote attacker, by leveraging social engineering tactics and crafted network traffic, could bypass the web origin policy. This could lead to unauthorized access or actions across different web origins.
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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 01:12:21 UTC
Improper certificate validation in CORS in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass web origin policy via crafted network traffic. (Chromium security severity: Low)