CVE-2026-12017

chromium-browser: chromium-browser: Insufficient validation of untrusted input  Extensions

Published Jun 11, 2026 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
Description
Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.115 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6344-1 chromium security update
History
Type Values Removed Values Added
Title Extension Handling Allows Site Isolation Bypass in Google Chrome chromium-browser: chromium-browser: Insufficient validation of untrusted input  Extensions
Weaknesses CWE-653
References
Metrics threat_severity

None

threat_severity

Important

Type Values Removed Values Added
Title Extension Handling Allows Site Isolation Bypass in Google Chrome
Type Values Removed Values Added
First Time appeared Apple
Apple macos
Linux
Linux linux Kernel
Microsoft
Microsoft windows
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Apple
Apple macos
Linux
Linux linux Kernel
Microsoft
Microsoft windows
Type Values Removed Values Added
Title Chrome Extension Vulnerability Enabling Site Isolation Bypass via Crafted HTML
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome
Type Values Removed Values Added
Title Chrome Extension Vulnerability Enabling Site Isolation Bypass via Crafted HTML
Type Values Removed Values Added
Description Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.115 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)
Weaknesses CWE-20
References

Sources

Status
PUBLISHED
Assigner
Chrome
Published
Updated
Jun 12, 2026, 1:37 AM
Reserved
Jun 11, 2026, 6:16 PM
Status
Analyzed
Published
Jun 11, 2026, 10:16 PM
Modified
Oct 25, 2026, 11:10 PM
Severity
Important
Public date
Jun 11, 2026, 8:48 PM