CVE-2026-40112

{
  "id": "CVE-2026-40112",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-09T22:16:34.707",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "PraisonAI is a multi-agent teams system. Prior to 4.5.128, the Flask API endpoint in src/praisonai/api.py renders agent output as HTML without effective sanitization. The _sanitize_html function relies on the nh3 library, which is not listed as a required or optional dependency in pyproject.toml. When nh3 is absent (the default installation), the sanitizer is a no-op that returns HTML unchanged. An attacker who can influence agent input (via RAG data poisoning, web scraping results, or prompt injection) can inject arbitrary JavaScript that executes in the browser of anyone viewing the API output. This vulnerability is fixed in 4.5.128."
    },
    {
      "lang": "es",
      "value": "PraisonAI es un sistema de equipos multiagente. Antes de la versión 4.5.128, el endpoint de la API de Flask en src/praisonai/api.py renderiza la salida del agente como HTML sin una sanitización efectiva. La función _sanitize_html depende de la biblioteca nh3, la cual no está listada como una dependencia requerida u opcional en pyproject.toml. Cuando nh3 está ausente (la instalación predeterminada), el sanitizador es una no-op que devuelve el HTML sin cambios. Un atacante que puede influir en la entrada del agente (mediante envenenamiento de datos RAG, resultados de web scraping o inyección de prompts) puede inyectar JavaScript arbitrario que se ejecuta en el navegador de cualquiera que vea la salida de la API. Esta vulnerabilidad se ha corregido en la versión 4.5.128."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "MervinPraison",
          "product": "PraisonAI",
          "versions": [
            {
              "version": "< 4.5.128",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
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          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5
      },
      {
        "source": "[email protected]",
        "type": "Primary",
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          "baseSeverity": "MEDIUM",
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          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
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      }
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-14T14:43:40.691981Z",
          "id": "CVE-2026-40112",
          "options": [
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              "exploitation": "poc"
            },
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            },
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          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
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  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
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  "references": [
    {
      "url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-cfg2-mxfj-j6pw",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
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      "url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-cfg2-mxfj-j6pw",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
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}