CVE-2026-12456

Name: CVE-2026-12456
Creator: NVD / NIST
Published: 2026-06-17T13:20:01.197+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.2/10EPSS 0.14%

Last modified Jun 17, 2026

CVE-2026-12456 is a medium-severity vulnerability rated 4.2/10 on the CVSS scale. 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). EPSS estimates a 0.14% chance of exploitation in the next 30 days.

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)

Metrics

CVSS 3.1

4.2/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS Probability

0.14%

3.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Google	Chrome	< 149.0.7827.155

References

https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01750511403.htmlVendor Advisory
https://issues.chromium.org/issues/517124587Permissions Required

Timeline

Published: Jun 17, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-12456?

How severe is CVE-2026-12456?

CVE-2026-12456 has a CVSS score of 4.2/10 (MEDIUM severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2026-12456?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-12456?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST