CVE-2026-118667
mediumLangGraph Python SDK is used to connect to running LangGraph API servers, manage assistants, threads and stream runs from Python applications.
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/langchain-ai/langgraph/commit/d89c7e100ec6fc1512544d23b0a7c5169699ef3e security-advisories@github.com
- https://github.com/langchain-ai/langgraph/pull/9213 security-advisories@github.com
- https://github.com/langchain-ai/langgraph/releases/tag/1.2.14 security-advisories@github.com
- https://github.com/langchain-ai/langgraph/releases/tag/sdk%3D%3D0.4.6 security-advisories@github.com
- https://github.com/langchain-ai/langgraph/security/advisories/GHSA-3fx2-cqw9-xr3c security-advisories@github.com