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CVE-2026-12456
Google Chrome Extension Same Origin Policy Bypass
Overview
Description

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)

Details
INFO

Published Date :

June 17, 2026, 1:38 a.m.

Last Modified :

June 17, 2026, 1:38 a.m.

Remotely Exploit :

No

Source :

Chrome
Impact
Affected Products

The following products are affected by CVE-2026-12456 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Google chrome
2 Google chrome
: Total Affected Vendor : 1 | Products : 2
Solution
Update Google Chrome to version 149.0.7827.155 or later to fix the issue.
  • Update Google Chrome to the latest version.
  • Ensure extensions meet security requirements.
  • Educate users about malicious extensions.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-12456 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.