Chrome <157.0.8103.38: DevTools Missing Auth, Bypass Site Isolation via crafted extension
CVE-2026-121253 Published on November 3, 2026
Missing authorization in DevTools in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to bypass site isolation via a crafted Chrome extension. (Chromium security severity: Low)
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-121253 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-121253
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Affected Versions
Google Chrome:- Version 157.0.8103.38 and below 157.0.8103.38 is affected.