CVE-2026-12456

State: Published
Severity: 4.2 Medium
Published: Jun 17, 2026
Updated: Jun 17, 2026
Reserved: Jun 16, 2026

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)

Scores

CVSS	Score	Vector	Source
3.1	4.2 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-20 Insufficient validation of untrusted input

Affected Products

Product	Versions
ChromeGoogle	149.0.7827.155 to before 149.0.7827.155Affected

References

https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01750511403.html
https://issues.chromium.org/issues/517124587

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