Bug 2571993 (CVE-2026-126896)

Summary: CVE-2026-126896 chromium-browser: chromium-browser: Web origin policy bypass via crafted HTML page
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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Hardware: All   
OS: Linux   
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A flaw was found in the V8 engine in chromium-browser. Due to missing authorization checks, a remote attacker can bypass web origin policy restrictions by tricking a user into loading a specially crafted HTML page. Successful exploitation could allow the attacker to access or manipulate sensitive data belonging to other websites within the user's browser session.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2572161, 2572162    
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Description OSIDB Bzimport 2026-11-11 22:53:48 UTC
Missing authorization in V8 in Google Chrome prior to 157.0.8103.78 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: High)