Description
Use after free in WebMCP in Google Chrome prior to 150.0.7871.186 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
Published: 2026-07-23
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A use‑after‑free flaw in the WebMCP component of Google Chrome allows a remote attacker to execute arbitrary code inside a sandbox from a crafted HTML page. The weakness is a classic memory safety issue (CWE‑416). Based on the description, it is inferred that if exploited the attacker can run code with the privileges of the browser process, potentially affecting the host system or other applications running with the same user credentials.

Affected Systems

Google Chrome versions prior to 150.0.7871.186 are affected. The vulnerability exists in all platforms that ship the Chrome browser before this version, including Windows, macOS, Linux, and Chrome OS devices that use the embedded browser component.

Risk and Exploitability

The CVSS score of 8.8 reflects a high severity with full remote exploitation ability. The EPSS score of less than 1% indicates a low current likelihood of exploitation, and the vulnerability is not listed in CISA's KEV catalog. Based on the description, it is inferred that the attack can be triggered via a crafted HTML page, meaning any user who opens potentially malicious web content could be compromised. The attack vector is inferred to be a remote attacker delivering a malicious web page to an unsuspecting user who later visits the page in Chrome.

Generated by OpenCVE AI on August 3, 2026 at 20:52 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade Google Chrome to version 150.0.7871.186 or later
  • Configure Chrome to render content from untrusted sources in sandboxed iframes where possible
  • Apply a site‑wide Content Security Policy to restrict executable scripts in user‑generated content

Generated by OpenCVE AI on August 3, 2026 at 20:52 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, 24 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Title chromium-browser: Chromium: Arbitrary code execution via use after free vulnerability in WebMCP
References
Metrics threat_severity

None

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

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

threat_severity

Important


Thu, 23 Jul 2026 23:45:00 +0000

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

Thu, 23 Jul 2026 22:45:00 +0000

Type Values Removed Values Added
Description Use after free in WebMCP in Google Chrome prior to 150.0.7871.186 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
Weaknesses CWE-416
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-07-25T03:55:16.640Z

Reserved: 2026-07-23T20:51:37.592Z

Link: CVE-2026-16806

cve-icon Vulnrichment

Updated: 2026-07-24T12:44:19.661Z

cve-icon NVD

Status : Analyzed

Published: 2026-07-23T22:16:52.640

Modified: 2026-07-27T12:45:30.967

Link: CVE-2026-16806

cve-icon Redhat

Severity : Important

Publid Date: 2026-07-23T21:36:43Z

Links: CVE-2026-16806 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T21:00:12Z

Weaknesses