CVE-2026-12460

chromium-browser: chromium-browser: Insufficient policy enforcement in File System Access

Published Jun 17, 2026 CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed
Description
Insufficient policy enforcement in File System Access 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 PDF file. (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-6351-1 chromium security update
History
Type Values Removed Values Added
Title chromium-browser: chromium-browser: Insufficient policy enforcement in File System Access
Weaknesses CWE-807
References
Metrics threat_severity

None

threat_severity

Important

Type Values Removed Values Added
Title Renderer Compromise Enables Site Isolation Bypass via Crafted PDF File in Chrome
Type Values Removed Values Added
Title Renderer Compromise Enables Site Isolation Bypass via Crafted PDF File in Chrome
Weaknesses CWE-284
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/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
Description Insufficient policy enforcement in File System Access 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 PDF file. (Chromium security severity: High)
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Chrome
Published
Updated
Jun 17, 2026, 1:15 PM
Reserved
Jun 16, 2026, 7:38 PM
Status
Analyzed
Published
Jun 17, 2026, 1:20 PM
Modified
Oct 26, 2026, 12:10 PM
Severity
Important
Public date
Jun 17, 2026, 1:38 AM