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2 vulnerabilities found for langchainjs by langchain-ai

CVE-2025-68665 (GCVE-0-2025-68665)
Vulnerability from nvd
Published
2025-12-23 22:56
Modified
2025-12-23 22:56
Severity ?
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE
  • CWE-502 - Deserialization of Untrusted Data
Summary
LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS's toJSON() method (and subsequently when string-ifying objects using JSON.stringify(). The method did not escape objects with 'lc' keys when serializing free-form data in kwargs. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in @langchain/core versions 0.3.80 and 1.1.8, and langchain versions 0.3.37 and 1.2.3
References
Impacted products
Vendor Product Version
langchain-ai langchainjs Version: @langchain/core >= 1.0.0, < 1.1.8
Version: @langchain/core < 0.3.80
Version: langchain >= 1.0.0, < 1.2.3
Version: langchain < 0.3.37
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "langchainjs",
          "vendor": "langchain-ai",
          "versions": [
            {
              "status": "affected",
              "version": "@langchain/core \u003e= 1.0.0, \u003c 1.1.8"
            },
            {
              "status": "affected",
              "version": "@langchain/core \u003c 0.3.80"
            },
            {
              "status": "affected",
              "version": "langchain \u003e= 1.0.0, \u003c 1.2.3"
            },
            {
              "status": "affected",
              "version": "langchain \u003c 0.3.37"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS\u0027s toJSON() method (and subsequently when string-ifying objects using JSON.stringify(). The method did not escape objects with \u0027lc\u0027 keys when serializing free-form data in kwargs. The \u0027lc\u0027 key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in @langchain/core versions 0.3.80 and 1.1.8, and langchain versions 0.3.37 and 1.2.3"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "CWE-502: Deserialization of Untrusted Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-23T22:56:04.837Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-r399-636x-v7f6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-r399-636x-v7f6"
        },
        {
          "name": "https://github.com/langchain-ai/langchainjs/commit/e5063f9c6e9989ea067dfdff39262b9e7b6aba62",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/langchain-ai/langchainjs/commit/e5063f9c6e9989ea067dfdff39262b9e7b6aba62"
        },
        {
          "name": "https://github.com/langchain-ai/langchainjs/releases/tag/%40langchain%2Fcore%401.1.8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/langchain-ai/langchainjs/releases/tag/%40langchain%2Fcore%401.1.8"
        },
        {
          "name": "https://github.com/langchain-ai/langchainjs/releases/tag/langchain%401.2.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/langchain-ai/langchainjs/releases/tag/langchain%401.2.3"
        }
      ],
      "source": {
        "advisory": "GHSA-r399-636x-v7f6",
        "discovery": "UNKNOWN"
      },
      "title": "LangChain serialization injection vulnerability enables secret extraction"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-68665",
    "datePublished": "2025-12-23T22:56:04.837Z",
    "dateReserved": "2025-12-22T23:28:02.917Z",
    "dateUpdated": "2025-12-23T22:56:04.837Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2025-68665 (GCVE-0-2025-68665)
Vulnerability from cvelistv5
Published
2025-12-23 22:56
Modified
2025-12-23 22:56
Severity ?
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE
  • CWE-502 - Deserialization of Untrusted Data
Summary
LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS's toJSON() method (and subsequently when string-ifying objects using JSON.stringify(). The method did not escape objects with 'lc' keys when serializing free-form data in kwargs. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in @langchain/core versions 0.3.80 and 1.1.8, and langchain versions 0.3.37 and 1.2.3
References
Impacted products
Vendor Product Version
langchain-ai langchainjs Version: @langchain/core >= 1.0.0, < 1.1.8
Version: @langchain/core < 0.3.80
Version: langchain >= 1.0.0, < 1.2.3
Version: langchain < 0.3.37
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "langchainjs",
          "vendor": "langchain-ai",
          "versions": [
            {
              "status": "affected",
              "version": "@langchain/core \u003e= 1.0.0, \u003c 1.1.8"
            },
            {
              "status": "affected",
              "version": "@langchain/core \u003c 0.3.80"
            },
            {
              "status": "affected",
              "version": "langchain \u003e= 1.0.0, \u003c 1.2.3"
            },
            {
              "status": "affected",
              "version": "langchain \u003c 0.3.37"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS\u0027s toJSON() method (and subsequently when string-ifying objects using JSON.stringify(). The method did not escape objects with \u0027lc\u0027 keys when serializing free-form data in kwargs. The \u0027lc\u0027 key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in @langchain/core versions 0.3.80 and 1.1.8, and langchain versions 0.3.37 and 1.2.3"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "CWE-502: Deserialization of Untrusted Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-23T22:56:04.837Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-r399-636x-v7f6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-r399-636x-v7f6"
        },
        {
          "name": "https://github.com/langchain-ai/langchainjs/commit/e5063f9c6e9989ea067dfdff39262b9e7b6aba62",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/langchain-ai/langchainjs/commit/e5063f9c6e9989ea067dfdff39262b9e7b6aba62"
        },
        {
          "name": "https://github.com/langchain-ai/langchainjs/releases/tag/%40langchain%2Fcore%401.1.8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/langchain-ai/langchainjs/releases/tag/%40langchain%2Fcore%401.1.8"
        },
        {
          "name": "https://github.com/langchain-ai/langchainjs/releases/tag/langchain%401.2.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/langchain-ai/langchainjs/releases/tag/langchain%401.2.3"
        }
      ],
      "source": {
        "advisory": "GHSA-r399-636x-v7f6",
        "discovery": "UNKNOWN"
      },
      "title": "LangChain serialization injection vulnerability enables secret extraction"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-68665",
    "datePublished": "2025-12-23T22:56:04.837Z",
    "dateReserved": "2025-12-22T23:28:02.917Z",
    "dateUpdated": "2025-12-23T22:56:04.837Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}