CVE-2026-87499

chromium-browser: chromium-browser: Incorrect authorization in Network

Published Sep 9, 2026 CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Description
Incorrect authorization in Network in Google Chrome prior to 153.0.8010.36 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 DLA Debian DLA DLA-4790-1 chromium security update
Debian DSA Debian DSA DSA-6506-1 chromium security update
History
Type Values Removed Values Added
First Time appeared Google
Google chrome
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
Vendors & Products Google
Google chrome
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'}

ssvc

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

cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'}

Type Values Removed Values Added
Title Chrome Network Authorization Flaw Enables Site Isolation Bypass chromium-browser: chromium-browser: Incorrect authorization in Network
Weaknesses CWE-653
References
Metrics threat_severity

None

cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'}

threat_severity

Important

Type Values Removed Values Added
Title Chrome Network Authorization Flaw Enables Site Isolation Bypass
Type Values Removed Values Added
Description Incorrect authorization in Network in Google Chrome prior to 153.0.8010.36 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-863
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Chrome
Published
Updated
Sep 10, 2026, 3:29 PM
Reserved
Sep 8, 2026, 10:38 PM
Status
Analyzed
Published
Sep 9, 2026, 1:17 AM
Modified
Sep 10, 2026, 7:24 PM
Severity
Important
Public date
Sep 9, 2026, 12:09 AM