{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.2.3"
                  },
                  {
                    "fixed": "1.2.14"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "0.4.0"
                  },
                  {
                    "fixed": "0.4.6"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "d89c7e100ec6fc1512544d23b0a7c5169699ef3e"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "1.2.14",
                "range": [
                  {
                    "fixed": "70dd64065bffaa3b6ab61a33f1f020fb54db8efa"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "original_tag": "sdk==0.4.6",
                "range": [
                  {
                    "fixed": "55b0e36c51d2922b11640b980fcfca1064243a96"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "83dd61feaca993d2ee428706ad04c869895ce400"
            },
            {
              "fixed": "70dd64065bffaa3b6ab61a33f1f020fb54db8efa"
            },
            {
              "introduced": "c7792608e3681e46bfb27555cd2ab22b57408515"
            },
            {
              "fixed": "55b0e36c51d2922b11640b980fcfca1064243a96"
            },
            {
              "fixed": "d89c7e100ec6fc1512544d23b0a7c5169699ef3e"
            }
          ],
          "repo": "https://github.com/langchain-ai/langgraph",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3fx2-cqw9-xr3c"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118667.json"
  },
  "details": "LangGraph Python SDK is used to connect to running LangGraph API servers, manage assistants, threads and stream runs from Python applications. From langgraph-sdk 0.4.0 until 0.4.6, and from langgraph 1.2.3 until 1.2.14 when RemoteGraph v3 streaming uses an affected langgraph-sdk version, the synchronous and asynchronous v3 stream get_tree and _fetch_state helpers interpolate caller-controlled assistant_id and thread_id values into authenticated GET request paths without using _quote_path_param. Relative path segments can therefore be normalized into another readable path on the configured server while retaining authentication headers. This issue is fixed in langgraph-sdk 0.4.6 and langgraph 1.2.14.",
  "id": "CVE-2026-118667",
  "modified": "2026-10-30T10:30:17.452511228Z",
  "published": "2026-10-28T20:51:46.657Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/langchain-ai/langgraph/releases/tag/1.2.14"
    },
    {
      "type": "WEB",
      "url": "https://github.com/langchain-ai/langgraph/releases/tag/sdk%3D%3D0.4.6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118667.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/langchain-ai/langgraph/security/advisories/GHSA-3fx2-cqw9-xr3c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118667"
    },
    {
      "type": "FIX",
      "url": "https://github.com/langchain-ai/langgraph/commit/d89c7e100ec6fc1512544d23b0a7c5169699ef3e"
    },
    {
      "type": "FIX",
      "url": "https://github.com/langchain-ai/langgraph/pull/9213"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests"
}