Description
Incorrect authorization in Extensions in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted Chrome extension. (Chromium security severity: Medium)
Published: 2026-11-03
Score: n/a
EPSS: n/a
KEV: No
Impact: Privilege Escalation
Action: Immediate Patch
AI Analysis

Impact

The vulnerability allows an attacker to bypass Chrome's built‑in authorization controls for extensions, enabling a malicious extension to perform privileged actions that normally would be restricted. This weakness, classified as CWE‑863, can lead to unauthorized operations on the host system. The impact extends to confidentiality, integrity, and availability when the attacker can gain elevated privileges through the compromised extension.

Affected Systems

Google Chrome versions prior to 157.0.8103.38 are affected. The issue is limited to desktop builds of the stable channel where the version check is insufficient to prevent installation of extensions crafted by remote actors.

Risk and Exploitability

No EPSS value is available; the risk of exploitation cannot be quantified but the problem is listed as Medium severity by Chromium. Because the attack requires social engineering to trick a user into installing a malicious extension, the likelihood hinges on user susceptibility rather than a direct exploitation vector. The vulnerability is not currently listed in the CISA KEV catalog, indicating no known active exploits at the time of publication.

Generated by OpenCVE AI on November 3, 2026 at 21:58 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Update Chrome to version 157.0.8103.38 or later to apply the official fix
  • Disable or restrict the installation of extensions from untrusted sources via Chrome's policy or settings
  • Monitor installed extensions and remove any that appear suspicious or were installed without a clear source

Generated by OpenCVE AI on November 3, 2026 at 21:58 UTC.

Tracking

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Advisories

No advisories yet.

History

Tue, 03 Nov 2026 22:15:00 +0000

Type Values Removed Values Added
Title Privilege Escalation via Untrusted Chrome Extension

Tue, 03 Nov 2026 22:00:00 +0000

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

Tue, 03 Nov 2026 20:45:00 +0000

Type Values Removed Values Added
Description Incorrect authorization in Extensions in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted Chrome extension. (Chromium security severity: Medium)
Weaknesses CWE-863
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-11-03T20:42:41.490Z

Reserved: 2026-11-03T09:24:54.619Z

Link: CVE-2026-121066

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-03T21:17:11.380

Modified: 2026-11-03T21:17:11.483

Link: CVE-2026-121066

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-03T22:00:05Z

Weaknesses