Description
Policy bypass in MHTML in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted MHTML page. (Chromium security severity: Low)
Published: 2026-07-30
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A policy bypass in the handling of MHTML files in Google Chrome allows a remote attacker to craft a malicious MHTML document that can leak cross‑origin data. The vulnerability does not provide code execution or denial of service, but it exposes private data the user is authorized to view, and it is classified as Low severity.

Affected Systems

Google Chrome desktop versions prior to 151.0.7922.72 are affected. The fix has been incorporated into recent stable channel releases by Google.

Risk and Exploitability

The CVSS score of 4.3 indicates a low overall impact, and the EPSS score of < 1% suggests that current exploitation rates are minimal. Attackers could exploit this vulnerability by delivering a malicious MHTML file that the victim opens in Chrome, making the risk dependent on user interaction. The vulnerability is not listed in CISA KEV, and there are no known active exploits yet.

Generated by OpenCVE AI on August 2, 2026 at 06:03 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade Google Chrome to version 151.0.7922.72 or later.
  • If an upgrade is not immediately possible, disable or block MHTML file handling via local policy or security settings.
  • Continuously monitor Chrome update notices for additional security patches and apply them as soon as they become available.

Generated by OpenCVE AI on August 2, 2026 at 06:03 UTC.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Debian DLA Debian DLA DLA-4710-1 chromium security update
Debian DSA Debian DSA DSA-6408-1 chromium security update
History

Fri, 31 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Title chromium-browser: chromium-browser: Policy bypass in MHTML
References
Metrics threat_severity

None

 threat_severity

Low

Thu, 30 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-346
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'}

Thu, 30 Jul 2026 07:45:00 +0000

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

Thu, 30 Jul 2026 01:00:00 +0000

Type Values Removed Values Added
Description Policy bypass in MHTML in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted MHTML page. (Chromium security severity: Low)
References

Subscriptions

Google Chrome
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-07-30T17:41:46.557Z

Reserved: 2026-07-27T23:37:07.514Z

Link: CVE-2026-17954

cve-icon Vulnrichment

Updated: 2026-07-30T17:41:43.647Z

cve-icon NVD

Status : Analyzed

Published: 2026-07-30T01:16:59.807

Modified: 2026-08-03T17:21:47.883

Link: CVE-2026-17954

cve-icon Redhat

Severity : Low

Publid Date: 2026-07-30T00:25:42Z

Links: CVE-2026-17954 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-02T06:15:12Z

Weaknesses