Answer in brief
CVE-2026-118667 records a Medium severity (CVSS 4.3) vulnerability in LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests. The current sources do not mark it as known exploited. The current feed maps langchain-ai/langgraph (generic), langchain-ai/langgraph-sdk (generic), langgraph (pip), langgraph-sdk (pip). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 4.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps langchain-ai/langgraph (generic), langchain-ai/langgraph-sdk (generic), langgraph (pip), langgraph-sdk (pip). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| langchain-ai/langgraphgeneric | >=1.2.3 <1.2.14 | 1.2.14 |
| langchain-ai/langgraph-sdkgeneric | >=0.4.0 <0.4.6 | 0.4.6 |
| langgraphpip | >=1.2.3,<1.2.14 | 1.2.14 |
| langgraph-sdkpip | >=0.4.0,<0.4.6 | 0.4.6 |
Published upstream
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 28, 2026
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.
Quoted source text, attributed separately from HOL analysis.