FKIE_CVE-2026-34070

Vulnerability from fkie_nvd - Published: 2026-03-31 03:15 - Updated: 2026-04-02 17:04
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
LangChain is a framework for building agents and LLM-powered applications. Prior to version 1.2.22, multiple functions in langchain_core.prompts.loading read files from paths embedded in deserialized config dicts without validating against directory traversal or absolute path injection. When an application passes user-influenced prompt configurations to load_prompt() or load_prompt_from_config(), an attacker can read arbitrary files on the host filesystem, constrained only by file-extension checks (.txt for templates, .json/.yaml for examples). This issue has been patched in version 1.2.22.
References
security-advisories@github.comhttps://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47cPatch
security-advisories@github.comhttps://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22Release Notes
security-advisories@github.comhttps://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54Exploit, Vendor Advisory
Impacted products
Vendor Product Version
langchain langchain *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:langchain:langchain:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B1D0654C-A99F-4835-9A30-865AEED16BC6",
              "versionEndExcluding": "1.2.22",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LangChain is a framework for building agents and LLM-powered applications. Prior to version 1.2.22, multiple functions in langchain_core.prompts.loading read files from paths embedded in deserialized config dicts without validating against directory traversal or absolute path injection. When an application passes user-influenced prompt configurations to load_prompt() or load_prompt_from_config(), an attacker can read arbitrary files on the host filesystem, constrained only by file-extension checks (.txt for templates, .json/.yaml for examples). This issue has been patched in version 1.2.22."
    },
    {
      "lang": "es",
      "value": "LangChain es un framework para construir agentes y aplicaciones impulsadas por LLM. Antes de la versi\u00f3n 1.2.22, m\u00faltiples funciones en langchain_core.prompts.loading le\u00edan archivos de rutas incrustadas en diccionarios de configuraci\u00f3n deserializados sin validar contra salto de directorio o inyecci\u00f3n de ruta absoluta. Cuando una aplicaci\u00f3n pasa configuraciones de prompt influenciadas por el usuario a load_prompt() o load_prompt_from_config(), un atacante puede leer archivos arbitrarios en el sistema de archivos del host, restringido solo por verificaciones de extensi\u00f3n de archivo (.txt para plantillas, .json/.yaml para ejemplos). Este problema ha sido parcheado en la versi\u00f3n 1.2.22."
    }
  ],
  "id": "CVE-2026-34070",
  "lastModified": "2026-04-02T17:04:43.713",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-31T03:15:58.947",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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