Description
Observable discrepancy in Prefetch in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)
Published: 2026-09-09
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Cross‑Origin Data Leak
Action: Patch
AI Analysis

Impact

The vulnerability is an observable discrepancy in the Prefetch behaviour of Google Chrome that permits a remote attacker to leak cross‑origin information through a specially crafted HTML page. This flaw is classified as a confidentiality issue and is identified as CWE‑203 and CWE‑204, highlighting that the browser can expose data that should be protected from cross‑origin readers.

Affected Systems

Google Chrome versions earlier than 153.0.8010.36 are affected by this Prefetch data‑leak issue.

Risk and Exploitability

The flaw receives a low severity rating of 4.3 and no EPSS score is available, and it is not listed in the CISA KEV catalog. The likely attack vector is remote, with an attacker delivering a crafted web page that a victim opens in Chrome; the Prefetch mechanism then exposes data from a different origin. Because the attack requires simply a victim’s browser to load the malicious page, the risk is considered low, but any scenario that involves sensitive cross‑origin information could be impacted.

Generated by OpenCVE AI on September 9, 2026 at 13:46 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade Chrome to version 153.0.8010.36 or newer.
  • Disable or restrict the Prefetch feature if a policy or setting exists to mitigate leak potential.
  • Apply a Content‑Security‑Policy header that prohibits cross‑origin requests that could expose sensitive data.

Generated by OpenCVE AI on September 9, 2026 at 13:46 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

Wed, 09 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google chrome
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
Vendors & Products Google
Google chrome

Wed, 09 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Wed, 09 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Title Cross-Origin Data Leakage via Prefetch in Google Chrome chromium-browser: chromium-browser: Observable discrepancy in Prefetch
Weaknesses CWE-204
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

Wed, 09 Sep 2026 06:45:00 +0000

Type Values Removed Values Added
Title Cross-Origin Data Leakage via Prefetch in Google Chrome

Wed, 09 Sep 2026 01:00:00 +0000

Type Values Removed Values Added
Description Observable discrepancy in Prefetch in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)
Weaknesses CWE-203
References

Subscriptions

Google Chrome
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-09-09T17:28:16.357Z

Reserved: 2026-09-08T22:42:56.349Z

Link: CVE-2026-87619

cve-icon Vulnrichment

Updated: 2026-09-09T17:27:47.674Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-09T01:17:20.057

Modified: 2026-09-09T20:21:56.350

Link: CVE-2026-87619

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-09T00:10:00Z

Links: CVE-2026-87619 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-11T00:00:06Z

Weaknesses
  • CWE-203

    Observable Discrepancy

  • CWE-204

    Observable Response Discrepancy