CVE-2026-12456 is a vulnerability in Google Chrome
Published on June 17, 2026
Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension to bypass same origin policy via a crafted Chrome Extension. (Chromium security severity: High)
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2026-12456
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Affected Versions
Google Chrome:- Version 149.0.7827.155 and below 149.0.7827.155 is affected.