CVE-2026-11658

chromium-browser: Insufficient validation of untrusted input in Extensions

Published Jun 8, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
Insufficient validation of untrusted input in Extensions in Google Chrome prior to 149.0.7827.103 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

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DSA Debian DSA DSA-6337-1 chromium security update
History
Type Values Removed Values Added
Title Chrome Extension Input Validation Flaw Enables Site Isolation Bypass chromium-browser: Insufficient validation of untrusted input in Extensions
Weaknesses CWE-1286
References
Metrics threat_severity

None

threat_severity

Important

Type Values Removed Values Added
Title Chrome Extension Input Validation Flaw Enables Site Isolation Bypass
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 Insufficient Input Validation in Chrome Extensions Enables Site Isolation Bypass
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N'}

Type Values Removed Values Added
Title Insufficient Input Validation in Chrome Extensions Enables Site Isolation Bypass
Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome
Type Values Removed Values Added
Description Insufficient validation of untrusted input in Extensions in Google Chrome prior to 149.0.7827.103 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 9, 2026, 1:48 PM
Reserved
Jun 8, 2026, 9:33 PM
Status
Analyzed
Published
Jun 9, 2026, 12:16 AM
Modified
Jul 23, 2026, 8:10 AM
Severity
Important
Public date
Jun 8, 2026, 12:00 AM