FKIE_CVE-2026-32112

Vulnerability from fkie_nvd - Published: 2026-03-11 21:16 - Updated: 2026-03-17 15:39
Severity ?
6.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
4.7 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
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
security-advisories@github.comhttps://github.com/homeassistant-ai/ha-mcp/security/advisories/GHSA-pf93-j98v-25pvVendor Advisory
Impacted products
Vendor Product Version
homeassistant-ai home_assistant_mcp_server *
To clipboard 

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  "configurations": [
    {
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          "cpeMatch": [
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  "descriptions": [
    {
      "lang": "en",
      "value": "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\u0027s 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."
    },
    {
      "lang": "es",
      "value": "ha-mcp es un servidor MCP de Home Assistant. Antes de la versi\u00f3n 7.0.0, el formulario de consentimiento OAuth de ha-mcp renderiza par\u00e1metros controlados por el usuario a trav\u00e9s de f-strings de Python sin escape HTML. Un atacante que pueda alcanzar el endpoint OAuth y convencer al operador del servidor de seguir una URL de autorizaci\u00f3n manipulada podr\u00eda ejecutar JavaScript en el navegador del operador. Esto afecta solo a los usuarios que ejecutan el modo OAuth beta (ha-mcp-oauth), que no forma parte de la configuraci\u00f3n est\u00e1ndar y requiere configuraci\u00f3n expl\u00edcita. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 7.0.0."
    }
  ],
  "id": "CVE-2026-32112",
  "lastModified": "2026-03-17T15:39:07.100",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
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        "type": "Secondary"
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          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
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        "exploitabilityScore": 1.6,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2026-03-11T21:16:17.450",
  "references": [
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      "tags": [
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    }
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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