CVE-2026-32111 MEDIUM

CVE-2026-32111: ha-mcp OAuth 2.1 DCR mode enables network reconnaissance via an error oracle

Vendor Homeassistant-Ai
Product ha-mcp
Weakness CWE-918 · SSRF
Published March 11, 2026
Last update March 12, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

ha-mcp is a Home Assistant MCP Server. Prior to 7.0.0, the ha-mcp OAuth consent form (beta feature) accepts a user-supplied ha_url and makes a server-side HTTP request to {ha_url}/api/config with no URL validation. An unauthenticated attacker can submit arbitrary URLs to perform internal network reconnaissance via an error oracle. Two additional code paths in OAuth tool calls (REST and WebSocket) are affected by the same primitive. The primary deployment method (private URL with pre-configured HOMEASSISTANT_TOKEN) is not affected. This vulnerability is fixed in 7.0.0.

Key dates

02Disclosure timeline

March 11, 2026 CVE published
March 12, 2026 Record updated