How severe is CVE-2026-32112?

CVE-2026-32112 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-32112 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32112?

CVE-2026-32112 affects Homeassistant-ai Home Assistant Mcp Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32112?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-32112 have an EU (EUVD) identifier?

Yes. CVE-2026-32112 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11385.

When was CVE-2026-32112 published?

CVE-2026-32112 was published on 2026-03-11 and last updated on 2026-06-17.

CVE-2026-32112

CVE-2026-32112 is a medium-severity vulnerability in Homeassistant-ai Home Assistant Mcp Server with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11385
Weakness: CWE-79
Affected product: Homeassistant-ai Home Assistant Mcp Server
Published: 2026-03-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-32112?: CVE-2026-32112 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-32112 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32112?: CVE-2026-32112 affects Homeassistant-ai Home Assistant Mcp Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32112?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-32112 have an EU (EUVD) identifier?: Yes. CVE-2026-32112 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11385.
When was CVE-2026-32112 published?: CVE-2026-32112 was published on 2026-03-11 and last updated on 2026-06-17.

References

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

Affected products (1)

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

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