{"id":"CVE-2026-118667","state":"PUBLISHED","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.","publishedAt":"2026-10-28T20:51:46.657Z","updatedAt":"2026-10-29T18:26:03.178Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["langchain-ai langgraph","langchain-ai langgraph-sdk"],"affected":[{"vendor":"langchain-ai","product":"langgraph","versions":[{"version":">= 1.2.3, < 1.2.14","status":"affected"}]},{"vendor":"langchain-ai","product":"langgraph-sdk","versions":[{"version":">= 0.4.0, < 0.4.6","status":"affected"}]}],"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"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/118xxx/CVE-2026-118667.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-118667","state":"PUBLISHED","datePublished":"2026-10-28T20:51:46.657Z","dateUpdated":"2026-10-29T18:26:03.178Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-28T17:25:37.562Z"},"containers":{"cna":{"title":"LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"langchain-ai","product":"langgraph","versions":[{"version":">= 1.2.3, < 1.2.14","status":"affected"}]},{"vendor":"langchain-ai","product":"langgraph-sdk","versions":[{"version":">= 0.4.0, < 0.4.6","status":"affected"}]}],"references":[{"url":"https://github.com/langchain-ai/langgraph/security/advisories/GHSA-3fx2-cqw9-xr3c","name":"https://github.com/langchain-ai/langgraph/security/advisories/GHSA-3fx2-cqw9-xr3c","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/langchain-ai/langgraph/pull/9213","name":"https://github.com/langchain-ai/langgraph/pull/9213","tags":["x_refsource_MISC"]},{"url":"https://github.com/langchain-ai/langgraph/commit/d89c7e100ec6fc1512544d23b0a7c5169699ef3e","name":"https://github.com/langchain-ai/langgraph/commit/d89c7e100ec6fc1512544d23b0a7c5169699ef3e","tags":["x_refsource_MISC"]},{"url":"https://github.com/langchain-ai/langgraph/releases/tag/1.2.14","name":"https://github.com/langchain-ai/langgraph/releases/tag/1.2.14","tags":["x_refsource_MISC"]},{"url":"https://github.com/langchain-ai/langgraph/releases/tag/sdk%3D%3D0.4.6","name":"https://github.com/langchain-ai/langgraph/releases/tag/sdk%3D%3D0.4.6","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-28T20:51:46.657Z"},"source":{"advisory":"GHSA-3fx2-cqw9-xr3c","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-29T18:25:51.378346Z","id":"CVE-2026-118667","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-29T18:26:03.178Z"}}]}}}