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. Based on the description, it is inferred that the vulnerability requires local access to a program that can load faulty Chrome binaries, so the primary risk is to 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 22, 2026 at 13:28 UTC.

Remediation

No solution or workaround provided in the CVE record.

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.
  • Use Windows AppLocker or Software Restriction Policies to block execution of local programs that may load vulnerable Chrome components.

Generated by OpenCVE AI on September 22, 2026 at 13:28 UTC.

Tracking

Sign in to view the affected projects.

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

Tue, 22 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Title chromium-browser: chromium-browser: Incorrect authorization in Core
Weaknesses CWE-551
References
Metrics threat_severity

None

 threat_severity

Important

Fri, 18 Sep 2026 15:00:00 +0000

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

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

Severity : Important

Publid Date: 2026-09-15T20:41:27Z

Links: CVE-2026-91734 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-22T13:30:17Z

Weaknesses
  • CWE-551

    Incorrect Behavior Order: Authorization Before Parsing and Canonicalization

  • CWE-863

    Incorrect Authorization