CVE-2026-12456CWE-20

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…

Medium · published June 17, 2026

CVSS v3.1
4.2
EPSS
0%
Percentile
2.9
In the wild
Unconfirmed
What it is

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)

The record
Technical detail
CVSS v3.1
4.2 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00137 · 2.9th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2026-06-17T01:38Z
EPSS history
Timeline
  • 17 JUN 01:38Z
    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…
    cvelistv5