{"cve":"CVE-2026-118667","nvd":{"published":"2026-10-28T21:16:57.113","modified":"2026-10-28T21:16:57.113","status":"Received","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-22"],"references":["https://github.com/langchain-ai/langgraph/commit/d89c7e100ec6fc1512544d23b0a7c5169699ef3e","https://github.com/langchain-ai/langgraph/pull/9213","https://github.com/langchain-ai/langgraph/releases/tag/1.2.14","https://github.com/langchain-ai/langgraph/releases/tag/sdk%3D%3D0.4.6","https://github.com/langchain-ai/langgraph/security/advisories/GHSA-3fx2-cqw9-xr3c"],"products":[],"source":"nvd","synced_at":"2026-10-28T21:45:43.571453220+00:00"},"epss":null,"kev":null,"osv":[{"id":"GHSA-3fx2-cqw9-xr3c","url":"https://osv.dev/vulnerability/GHSA-3fx2-cqw9-xr3c","summary":"LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests","modified":"2026-10-28T21:15:05.147749489Z","packages":[{"ecosystem":"PyPI","name":"langgraph-sdk","purl":"pkg:pypi/langgraph-sdk","ranges":[">=0.4.0 <0.4.6"],"fixed":["0.4.6"]},{"ecosystem":"PyPI","name":"langgraph","purl":"pkg:pypi/langgraph","ranges":[">=1.2.3 <1.2.14"],"fixed":["1.2.14"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}