Description
Incorrect authorization in Core in Google Chrome on on Windows prior to 153.0.8010.47 allowed a local attacker to execute arbitrary code outside the sandbox via a local program. (Chromium security severity: High)
Published: 2026-09-15
Score: 7.4 High
EPSS: < 1% Very Low
KEV: No
Impact: Local code execution
Action: Apply patch
AI Analysis

Impact

CVE-2026-91734 reveals an incorrect authorization check in the Core component of Google Chrome running on Windows. The flaw allows a local attacker to execute arbitrary code outside the browser sandbox using a locally run program, giving them full system control. This weakness corresponds to CWE-863 and can lead to complete compromise of confidentiality, integrity, and availability on affected machines.

Affected Systems

Affected systems are Windows machines that run Google Chrome versions earlier than 153.0.8010.47. All users of these browsers are vulnerable until the patch is applied.

Risk and Exploitability

The CVSS score of 7.4 indicates high severity, while the EPSS score of less than 1 % suggests a low probability of exploitation in the wild. Because the issue requires local access to a program that can load faulty Chrome binaries, the risk is primarily for users who inadvertently run malicious software on the local machine. The vulnerability is not currently listed in the CISA KEV catalog.

Generated by OpenCVE AI on September 16, 2026 at 18:45 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Install the latest Google Chrome stable release (version 153.0.8010.47 or newer).
  • Turn on Chrome automatic updates or manually download the patch from the official release site.
  • Restart the computer after updating to ensure all Chrome processes use the new binaries.

Generated by OpenCVE AI on September 16, 2026 at 18:45 UTC.

Tracking

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Advisories

No advisories yet.

History

Thu, 17 Sep 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft
Microsoft windows
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows

Wed, 16 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
Title Local Execution via Incorrect Authorization in Chrome Core on Windows

Wed, 16 Sep 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

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

Wed, 16 Sep 2026 00:00:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome

Tue, 15 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
Description Incorrect authorization in Core in Google Chrome on on Windows prior to 153.0.8010.47 allowed a local attacker to execute arbitrary code outside the sandbox via a local program. (Chromium security severity: High)
Weaknesses CWE-863
References

Subscriptions

Google Chrome
Microsoft Windows
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-09-17T03:56:04.244Z

Reserved: 2026-09-14T22:52:29.824Z

Link: CVE-2026-91734

cve-icon Vulnrichment

Updated: 2026-09-15T23:36:29.108Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-15T21:16:46.900

Modified: 2026-09-17T16:03:41.563

Link: CVE-2026-91734

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-16T18:45:10Z

Weaknesses