CVE-2026-11624: Model Context Protocol lacks Origin header validation allowing DNS rebinding

# CVE-2026-11624: Model Context Protocol lacks Origin header validation allowing DNS rebinding

https://gcdradar.vercel.app/incidents/cve-2026-11624-model-context-protocol-lacks-origin-header-va · AIR-2026-1111 · closed 2026-06-13

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-06-13
- AI role: Attack on AI
- Products: Model Context Protocol
- CVE ids: CVE-2026-11624
- CVSS: 9.4

## Summary

A vulnerability in the Model Context Protocol allowed incoming connections without origin host validation, risking DNS rebinding attacks. A patch introduced allowed hosts and origins flags to enforce strict access controls.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-06-13: CVE-2026-11624: The Model Context Protocol has a security warning advising servers to validate the "Origin" header on all incoming connections to… (https://nvd.nist.gov/vuln/detail/CVE-2026-11624)

## Sources

- 2026-06-13 NVD: CVE-2026-11624: The Model Context Protocol has a security warning advising servers to validate the "Origin" header on all incoming connections to… https://nvd.nist.gov/vuln/detail/CVE-2026-11624

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.