CVE-2026-12456

MEDIUM

Google Chrome - Improper Input Validation

Title source: rule
STIX 2.1

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 v3 4.2
EPSS 0.0014
EPSS Percentile 3.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (2)
google/chrome < 149.0.7827.155
Google/Chrome 149.0.7827.155
Published Jun 17, 2026
Tracked Since Jun 17, 2026