CVE-2026-32112

ha-mcp is a Home Assistant MCP Server. Prior to 7.0.0, the ha-mcp OAuth consent form renders user-controlled parameters via Python f-strings with no HTML escaping. An attacker who can reach the OAuth endpoint and convince the server operator to follow a crafted authorization URL could execute JavaScript in the operator's browser. This affects only users running the beta OAuth mode (ha-mcp-oauth), which is not part of the standard setup and requires explicit configuration. This vulnerability is fixed in 7.0.0.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/homeassistant-ai/ha-mcp/security/advisories/GHSA-pf93-j98v-25pv	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:homeassistant-ai:home_assistant_mcp_server:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-11 21:16

Updated : 2026-03-17 15:39

NVD link : CVE-2026-32112

Mitre link : CVE-2026-32112

CVE.ORG link : CVE-2026-32112

JSON object : View

Products Affected

homeassistant-ai

home_assistant_mcp_server

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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