CVE-2026-32112

MEDIUM

6.8

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.

CVE Details

CVSS v3.1 Score6.8

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionREQUIRED

Published3/11/2026

Last Modified3/17/2026

Sourcenvd

Honeypot Sightings0

Affected Products

homeassistant-ai:home_assistant_mcp_server

Weaknesses (CWE)

CWE-79

References

https://github.com/homeassistant-ai/ha-mcp/security/advisories/GHSA-pf93-j98v-25pv(security-advisories@github.com)

IOC Correlations

No correlations recorded

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