Disclosure summary
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.
Source-reported weakness categories
CWE-863
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-104873
Open original source · Updated Oct 06, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
GitHub Reviewed Security Advisories · GHSA-fvww-7h3r-vfhp
Open original source · Updated Oct 05, 2026
LangGraph SDK custom auth silently ignores actions= on resource decorators
Source severity: HIGH / 7.6
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| pip | langgraph-sdk | >= 0.1.45, | 0.4.4 |
Original records & references
PUBLISHED 2026-10-02T16:17:01-04:00
MODIFIED 2026-10-06T11:08:38-04:00
INGESTED 2026-10-06T11:45:30-04:00