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

Impact

Inappropriate handling of CSS in Google Chrome allowed a remote attacker to craft an HTML page that caused the browser to leak data from other web origins. This flaw, identified as CWE‑346, represents an external control of system parameters that bypasses same‑origin restrictions. The attacker can disclose sensitive information that would normally be protected by the browser’s security model.

Affected Systems

Google Chrome versions prior to 151.0.7922.72 on any supported platform are affected. The advisory does not list any additional vendor or product variants. Users of these releases are vulnerable if they load untrusted HTML content.

Risk and Exploitability

The CVSS score of 4.3 indicates a medium severity vulnerability. Because the EPSS score is less than 1% and the issue is not listed in KEV, the expected exploitation frequency is low. The attack likely requires that a victim load a crafted HTML page in Chrome, with no other elevated privileges needed. The impact is purely information disclosure rather than code execution or denial of service.

Generated by OpenCVE AI on August 4, 2026 at 12:04 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade Google Chrome to version 151.0.7922.72 or newer, which contains the fix for the CSS handling issue.
  • If an immediate update is not feasible, disable or restrict loading of custom CSS from untrusted origins by configuring browser settings or using extensions that enforce strict origin policies.
  • Where practicable, serve web content over HTTPS to reduce the chance that malicious pages can read sensitive data from other origins.

Generated by OpenCVE AI on August 4, 2026 at 12:04 UTC.

Tracking

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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

Thu, 30 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'}

 ssvc

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

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'}

Thu, 30 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
Title chromium-browser: chromium-browser: Inappropriate implementation in CSS
Weaknesses CWE-346
References
Metrics threat_severity

None

 cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'}

threat_severity

Moderate

Thu, 30 Jul 2026 05:00:00 +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 Inappropriate implementation in CSS in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
References

Subscriptions

Google Chrome
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-07-30T17:44:25.324Z

Reserved: 2026-07-27T23:35:02.496Z

Link: CVE-2026-17843

cve-icon Vulnrichment

Updated: 2026-07-30T17:44:14.960Z

cve-icon NVD

Status : Analyzed

Published: 2026-07-30T01:16:47.940

Modified: 2026-08-03T17:39:28.147

Link: CVE-2026-17843

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-07-30T00:19:36Z

Links: CVE-2026-17843 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-04T12:15:03Z

Weaknesses