CVE-2026-12457

MEDIUM4.2

Inappropriate implementation in Extensions in Google Chrome prior to 149

Published Jun 17, 2026

Modified 5 days ago

Fix available

Details

Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)

Affected Packages

Google Chrome

Windows 10 (1507)Windows 10 (1607) / Server 2016Windows 10 (1809) / Server 2019Windows 10 (1903)Windows 10 (1909)

Fixed in:

149.0.7827.155

References

WEB

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

WEB

https://issues.chromium.org/issues/517153117

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-12457

CVSS Analysis

CVSS v3.1

4.2

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

HighAC:H

Privileges Required

NonePR:N

User Interaction

RequiredUI:R

Scope

UnchangedS:U

Impact

Confidentiality

LowC:L

Integrity

LowI:L

Availability

NoneA:N

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

Ecosystems(22)

Windows 10 (1507)Windows 10 (1607) / Server 2016 Windows 10 (1809) / Server 2019 Windows 10 (1903)Windows 10 (1909)

Timeline

PublishedJun 17, 2026

ModifiedJun 17, 2026