{"id":"CVE-2026-118667","revision":"3e5657d47f8b4f64b6519767884d7a46","records":[{"revision":"3e5657d47f8b4f64b6519767884d7a46","observedAt":"2026-10-28T21:55:13.262+00:00","statement":{"source":"cve-program","id":"CVE-2026-118667","aliases":[],"title":"LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests","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.","state":0,"publishedAt":"2026-10-28T20:51:46.657+00:00","modifiedAt":"2026-10-28T20:51:46.657+00:00","affected":[{"ecosystem":"Vendor product","name":"langgraph","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"langchain-ai\",\n                    \"product\": \"langgraph\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.2.3, < 1.2.14\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"langgraph-sdk","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"langchain-ai\",\n                    \"product\": \"langgraph-sdk\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.4.0, < 0.4.6\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 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,"severity":"MEDIUM"}],"references":["https://github.com/langchain-ai/langgraph/security/advisories/GHSA-3fx2-cqw9-xr3c","https://github.com/langchain-ai/langgraph/pull/9213","https://github.com/langchain-ai/langgraph/commit/d89c7e100ec6fc1512544d23b0a7c5169699ef3e","https://github.com/langchain-ai/langgraph/releases/tag/1.2.14","https://github.com/langchain-ai/langgraph/releases/tag/sdk%3D%3D0.4.6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118667","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-118667","identifiers":["CVE-2026-118667"]},"retained":false,"historicalAffected":[]}],"coverage":[]}