Bug 2520786 (CVE-2026-76019)

Summary: CVE-2026-76019 chromium-browser: Chromium: Incorrect authorization in Workers allows web origin policy bypass
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in chromium-browser. Incorrect authorization in the Workers component allows a remote attacker, who has compromised the renderer process and leveraged social engineering, to bypass the web origin policy. This bypass is achieved by tricking a user into interacting with a specially crafted HTML page, potentially leading to unauthorized access to sensitive information or actions across different web origins.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2524346, 2524347    
Bug Blocks:    

Description OSIDB Bzimport 2026-08-20 21:03:05 UTC 
Incorrect authorization in Workers in Google Chrome prior to 151.0.7922.173 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to bypass web origin policy via a crafted HTML page. (Chromium security severity: High)