Description
Missing authorization in V8 in Google Chrome prior to 154.0.8037.57 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)
Published: 2026-09-29
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Cross‑origin data exposure
Action: Immediate Patch
AI Analysis

Impact

A missing authorization check in the V8 JavaScript engine of Google Chrome versions prior to 154.0.8037.57 allows a remote attacker to craft a malicious HTML page that bypasses the browser’s origin policy. The flaw, identified as CWE-862, can enable a malicious site to read or manipulate data normally restricted to other origins, potentially exposing confidential data.

Affected Systems

The vulnerability affects Google Chrome on all supported platforms. Any installation of Chrome with a version number older than 154.0.8037.57 is susceptible to this flaw.

Risk and Exploitability

The CVSS score of 4.3 indicates low severity, and EPSS data is unavailable. The vulnerability is not listed in CISA’s KEV catalog, and Chromium rates its severity as low. However, because the attack vector is a widely deployed browser and exploitation requires only that a user visit a crafted web page, the risk of unintentional exploitation remains significant.

Generated by OpenCVE AI on September 30, 2026 at 09:16 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade Chrome to version 154.0.8037.57 or newer.
  • Restart all Chrome processes to ensure the updated engine is in use.
  • Until the update can be applied, limit or block JavaScript execution on untrusted sites using a browser extension or a content security policy that restricts script source to trusted origins.

Generated by OpenCVE AI on September 30, 2026 at 09:16 UTC.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Debian DSA Debian DSA DSA-6513-1 chromium security update
History

Thu, 01 Oct 2026 15:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

Wed, 30 Sep 2026 17:30:00 +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'}

 cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'}

Wed, 30 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Title Remote Origin Policy Bypass via V8 Authorization Flaw in Chromium chromium-browser: chromium-browser: Missing authorization in V8
Weaknesses CWE-346
References
Metrics threat_severity

None

 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'}

threat_severity

Moderate

Tue, 29 Sep 2026 23:30:00 +0000

Type Values Removed Values Added
Title Remote Origin Policy Bypass via V8 Authorization Flaw in Chromium

Tue, 29 Sep 2026 20:30:00 +0000

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

Tue, 29 Sep 2026 17:45:00 +0000

Type Values Removed Values Added
Description Missing authorization in V8 in Google Chrome prior to 154.0.8037.57 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)
Weaknesses CWE-862
References

Subscriptions

Google Chrome
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-09-30T16:49:15.402Z

Reserved: 2026-09-22T05:09:49.220Z

Link: CVE-2026-95342

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2026-09-29T18:17:26.887

Modified: 2026-10-01T15:05:29.890

Link: CVE-2026-95342

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-29T17:32:00Z

Links: CVE-2026-95342 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T09:30:18Z

Weaknesses