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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
langchain-ai:langgraph
langchain-ai:langgraph-sdk
References 5
https://github.com/langchain-ai/langgraph/commit/d89c7e100ec6fc1512544d23b0a7c5…
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-xr…
security-advisories@github.com