CVE-2026-16806: Use after free in WebMCP
Chromium: CVE-2026-16806 Use after free in WebMCP
Other sources
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
— Microsoft
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)
— MITRE
Credit
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 150.0.7871.186 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 150.0.4078.99 - Upgrade
Upgrade
Chromium (Google Chrome / Edge Chromium-based)to a version that resolves this vulnerability.Fixed in 150.0.7871.186Patch CVE-2026-16806
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2026-16806?
CVE-2026-16806 has a high severity rating of 8.8 due to its potential impact on confidentiality, integrity, and availability.
How do I fix CVE-2026-16806?
To mitigate CVE-2026-16806, users should update Google Chrome or Microsoft Edge to the latest version that addresses the vulnerability.
What is the nature of the vulnerability in CVE-2026-16806?
CVE-2026-16806 is a use after free vulnerability found in WebMCP, which can potentially allow an attacker to execute arbitrary code.
Which software is affected by CVE-2026-16806?
CVE-2026-16806 affects Google Chrome and Microsoft Edge, particularly the Chromium-based version.
When was CVE-2026-16806 published?
CVE-2026-16806 was published on June 10, 2026.