{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:langchain:langchain:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.3.85"
              },
              {
                "introduced": "1.0.0"
              },
              {
                "fixed": "1.3.3"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "33a74aea3b0f563f926249977372d6935be2bce0"
            },
            {
              "introduced": "4a65e827f7d7fd8139a4232f408a005f704dc71b"
            },
            {
              "fixed": "14b1a243e57dc07d3b1e7b77e8f76c232533a2e4"
            }
          ],
          "repo": "https://github.com/langchain-ai/langchain",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-pjwx-r37v-7724"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-502"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44843.json"
  },
  "details": "LangChain is a framework for building agents and LLM-powered applications. Prior to 0.3.85 and 1.3.3, LangChain contains older runtime code paths that deserialize run inputs, run outputs, or other application-controlled payloads using overly broad object allowlists. These paths may call load() with allowed_objects=\"all\". This does not enable arbitrary Python object deserialization, but it does allow any trusted LangChain-serializable object to be revived, which is broader than these runtime paths require. As a result, attacker-supplied LangChain serialized constructor dictionaries may cause trusted runtime paths to instantiate classes with untrusted constructor arguments. This vulnerability is fixed in 0.3.85 and 1.3.3.",
  "id": "CVE-2026-44843",
  "modified": "2026-07-15T01:49:04.028165287Z",
  "published": "2026-05-26T19:47:35.328Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44843.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/langchain-ai/langchain/security/advisories/GHSA-pjwx-r37v-7724"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44843"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "LangChain: Unsafe deserialization of attacker-controlled LangChain objects through overly broad `load()` allowlists"
}