Description
Information leak in WebMCP in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
Published: 2026-09-09
Score: 3.1 Low
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 09 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
Title WebMCP Information Leak Enabling Cross‑Origin Data Exfiltration in Google Chrome

Wed, 09 Sep 2026 18:15:00 +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 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/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'}


Wed, 09 Sep 2026 07:00:00 +0000

Type Values Removed Values Added
Title WebMCP Information Leak Enabling Cross‑Origin Data Exfiltration in Google Chrome

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

Type Values Removed Values Added
Description Information leak in WebMCP in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
Weaknesses CWE-200
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-09-09T15:07:42.861Z

Reserved: 2026-09-08T22:39:23.905Z

Link: CVE-2026-87521

cve-icon Vulnrichment

Updated: 2026-09-09T15:07:23.868Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-09T01:17:09.243

Modified: 2026-09-09T18:02:53.943

Link: CVE-2026-87521

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-09T19:30:15Z

Weaknesses