CVE-2026-32112

MEDIUM

ha-mcp < 7.0.0 - Stored Cross-Site Scripting via OAuth Consent Form

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1

Scores

CVSS v3 6.8
EPSS 0.0004
EPSS Percentile 11.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-79
Status published
Products (2)
homeassistant-ai/home_assistant_mcp_server < 7.0.0
pypi/ha-mcp 0 - 7.0.0PyPI
Published Mar 11, 2026
Tracked Since Mar 12, 2026