LangGraphPublished 28 Oct 2026NVD status: Awaiting Analysis

CVE-2026-118667

LangGraph Python SDK is used to connect to running LangGraph API servers, manage assistants, threads and stream runs from Python applications.

ComponentLangGraph (langgraph-sdk)
Severitymedium (CVSS 4.3)
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Published (NVD)2026-10-28
Last modified2026-10-29
Affected versions
LangGraph (langgraph-sdk):
>= 0.4.0, < 0.4.6
LangGraph (langgraph (Python)):
>= 1.2.3, < 1.2.14
from the GitHub-reviewed advisory GHSA-3fx2-cqw9-xr3c
Fixed in0.4.6, 1.2.14
WeaknessCWE-22
CISA KEVnot listed

Versions, checked against NVD

LangGraph (langgraph-sdk): NVD's record (status: Awaiting Analysis) lists no affected versions of LangGraph (langgraph-sdk) for this CVE. The ranges above come from the GitHub-reviewed advisory GHSA-3fx2-cqw9-xr3c.

LangGraph (langgraph (Python)): NVD's record (status: Awaiting Analysis) lists no affected versions of LangGraph (langgraph (Python)) for this CVE. The ranges above come from the GitHub-reviewed advisory GHSA-3fx2-cqw9-xr3c.

NVD 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.

What to do

  • Upgrade LangGraph to the fixed release of the branch you run: 0.4.6 or 1.2.14, or later.
  • Do not expose the component's API or UI to the internet without authentication in front of it.

Sources