CVE-2026-32112 — ha-mcp has XSS via Unescaped HTML in OAuth Consent Form

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
homeassistant-ai / ha-mcp	affected < 7.0.0

CWE

CWE-79

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.