How severe is CVE-2026-32111?

CVE-2026-32111 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-32111 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32111?

CVE-2026-32111 affects Homeassistant-ai Home Assistant Mcp Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32111?

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

Does CVE-2026-32111 have an EU (EUVD) identifier?

Yes. CVE-2026-32111 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11383.

When was CVE-2026-32111 published?

CVE-2026-32111 was published on 2026-03-11 and last updated on 2026-06-17.

CVE-2026-32111

CVE-2026-32111 is a medium-severity vulnerability in Homeassistant-ai Home Assistant Mcp Server with a CVSS 3.x base score of 5.3. 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-918.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11383
Weakness: CWE-918
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 (beta feature) accepts a user-supplied ha_url and makes a server-side HTTP request to {ha_url}/api/config with no URL validation. An unauthenticated attacker can submit arbitrary URLs to perform internal network reconnaissance via an error oracle. Two additional code paths in OAuth tool calls (REST and WebSocket) are affected by the same primitive. The primary deployment method (private URL with pre-configured HOMEASSISTANT_TOKEN) is not affected. This vulnerability is fixed in 7.0.0.

Frequently asked questions

What is CVE-2026-32111?: ha-mcp is a Home Assistant MCP Server. Prior to 7.0.0, the ha-mcp OAuth consent form (beta feature) accepts a user-supplied ha_url and makes a server-side HTTP request to {ha_url}/api/config with no URL validation. An unauthenticated attacker can submit arbitrary URLs to perform internal network reconnaissance via an error oracle. Two additional code paths in OAuth tool calls (REST and WebSocket) are affected by the same primitive. The primary deployment method (private URL with pre-configured HOMEASSISTANT_TOKEN) is not affected. This vulnerability is fixed in 7.0.0.
How severe is CVE-2026-32111?: CVE-2026-32111 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-32111 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32111?: CVE-2026-32111 affects Homeassistant-ai Home Assistant Mcp Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32111?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-32111 have an EU (EUVD) identifier?: Yes. CVE-2026-32111 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11383.
When was CVE-2026-32111 published?: CVE-2026-32111 was published on 2026-03-11 and last updated on 2026-06-17.

References

https://github.com/homeassistant-ai/ha-mcp/security/advisories/GHSA-fmfg-9g7c-3vq7

Affected products (1)

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

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