| Component | LangGraph |
| Severity | high (CVSS 7.6) |
| CVSS vector | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| Published (NVD) | 2026-10-02 |
| Last modified | 2026-10-06 |
| Affected versions | >= 0.1.45, <= 0.4.4 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | see the vendor advisory |
| Weakness | CWE-863 |
| CISA KEV | not listed |
NVD description
LangGraph Python SDK is used to connect to running LangGraph API servers, manage assistants, threads and stream runs from Python applications. From 0.1.45 until 0.4.4, the langgraph-sdk resource-scoped authorization decorators @auth.on.threads, @auth.on.assistants, and @auth.on.crons ignore the actions argument and register the selected handler for every action on the resource. Because that wildcard resource handler is selected before broader fallback handlers, an authenticated user may bypass fallback action, ownership, or permission checks and read, update, or delete another user's resource. Only Python deployments using actions on the affected decorators are vulnerable, and a deployment remains protected when the selected handler independently enforces all required checks for every action it receives. This issue is fixed in version 0.4.4.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep LangGraph off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-104873
- https://github.com/langchain-ai/langgraph/commit/5a77be5e8bec1600ad0a865638d88c1368497559
- https://github.com/langchain-ai/langgraph/releases/tag/sdk==0.4.4
- https://github.com/langchain-ai/langgraph/security/advisories/GHSA-fvww-7h3r-vfhp
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