CVE-2026-111769 in modelcontextprotocol

Prediction

by VulDB Data Team • 10/20/2026

A security vulnerability has been detected in <a href="/product/modelcontextprotocol">modelcontextprotocol</a>. Impacted is the function <code>auth</code> of the component <em>StreamableHTTPClientTransport/SSEClientTransport</em>. Such manipulation of the argument <em>redirectPolicy</em> leads to permissive cross-domain policy with untrusted domains. The attack can be launched remotely.

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• Moderation: accepted
• Entry: VDB-423033
• CWE: CWE-942 (confirmed)
• CVSS: 3.1 (VulDB)
• EPSS: 0.00000
• KEV: no
• Activities: very low

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-111769
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111769
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-111769/