TI-2026-24649 Aliases CVE-2026-32111 GHSA-fmfg-9g7c-3vq7

ha-mcp OAuth 2.1 DCR mode enables network reconnaissance via an error oracle

LOW 30CWE-918Published 2026-03-11 · Updated 2026-03-12

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00325 25th percentileScored 2026-11-07

Fix Fixed ha-mcp (homeassistant-ai): 7.0.0ha-mcp (PyPI): 7.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
homeassistant-ai	ha-mcp	before 7.0.0	7.0.0	Patch available	CNA
—	ha-mcp (PyPI)	before 7.0.0	7.0.0	Patch available	GHSA-fmfg-9g7c-3vq7

ha-mcp Vendorhomeassistant-ai Affected before 7.0.0 Fixed in 7.0.0 Patch available CNA
ha-mcp (PyPI) Vendor— Affected before 7.0.0 Fixed in 7.0.0 Patch available GHSA-fmfg-9g7c-3vq7

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:homeassistant-ai:home_assistant_mcp_server::::::::	before 7.0.0	Vulnerable	homeassistant-ai

cpe:2.3:a:homeassistant-ai:home_assistant_mcp_server:*:*:*:*:*:*:*:* Versions before 7.0.0 Vulnerable ·homeassistant-ai

Remediation

Fix · CNA ha-mcp (homeassistant-ai) Fixed in 7.0.0
Fix · GHSA-fmfg-9g7c-3vq7 ha-mcp (PyPI) Fixed in 7.0.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-32111
2026-10-03 Alias added: GHSA-fmfg-9g7c-3vq7

References

Advisory 2

Other 1

https://github.com/homeassistant-ai/ha-mcp

TI-2026-24650 ha-mcp has XSS via Unescaped HTML in OAuth Consent Form CVSS 3.1MEDIUM 6.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences