Description
Incorrect authorization in Isolated in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass web origin policy into a privileged page via a crafted HTML page. (Chromium security severity: Medium)
Published: 2026-09-09
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Origin Policy Bypass
Action: Patch
AI Analysis

Impact

This vulnerability is an incorrect authorization check in Chrome’s isolated mode. A maliciously crafted HTML page can exploit this flaw to bypass the browser’s web origin policy and access a privileged page. By doing so, an attacker can read or modify data that should only be available to trusted pages, causing confidentiality or integrity violations within the user’s session.

Affected Systems

Google Chrome desktop browsers running any version prior to 153.0.8010.36 are affected. The flaw resides in Chrome’s isolation component and impacts all standard installations of the stable channel on supported operating systems.

Risk and Exploitability

The CVSS score of 4.3 indicates medium severity, and the issue is not listed in the CISA KEV catalog. The EPSS score of <1% (approximately 0.00188) indicates a very low exploitation probability. The exploit requires a user to visit a crafted malicious page, which is a remote attack that depends on phishing or drive‑by downloads. Given the low EPSS and user interaction requirement, the risk remains low to moderate for exposed users.

Generated by OpenCVE AI on September 9, 2026 at 20:18 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update Chrome to version 153.0.8010.36 or later via the standard update channel or manual download from Google.
  • Restart the browser after the update to ensure the patch is active.
  • If immediate updating is not possible, avoid loading untrusted web pages that might trigger the isolated mode in sensitive contexts until the patch is applied.

Generated by OpenCVE AI on September 9, 2026 at 20:18 UTC.

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

Thu, 10 Sep 2026 14:00:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google chrome
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
Vendors & Products Google
Google chrome

Wed, 09 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
Title Chrome Origin Policy Bypass via Crafted HTML in Isolated Mode

Wed, 09 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/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'}

Wed, 09 Sep 2026 08:15:00 +0000

Type Values Removed Values Added
Title Chrome Origin Policy Bypass via Crafted HTML in Isolated Mode

Wed, 09 Sep 2026 01:00:00 +0000

Type Values Removed Values Added
Description Incorrect authorization in Isolated in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass web origin policy into a privileged page via a crafted HTML page. (Chromium security severity: Medium)
Weaknesses CWE-863
References

Subscriptions

Google Chrome
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-09-09T17:26:52.504Z

Reserved: 2026-09-08T22:41:10.516Z

Link: CVE-2026-87577

cve-icon Vulnrichment

Updated: 2026-09-09T17:25:14.348Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-09T01:17:15.493

Modified: 2026-09-10T13:49:30.050

Link: CVE-2026-87577

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T14:15:07Z

Weaknesses