---
id: CVE-2026-104873
title: >-
  LangGraph Python SDK is used to connect to running LangGraph API servers,
  manage assistants, threads and stream runs from Python applications
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.t…
severity: high
cvss: 7.6
cvssVector: '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'
cwe:
  - CWE-863
  - CWE-430
vendor: langchain-ai
product: langgraph
affected:
  - 'langgraph >= 0.1.45, < 0.4.4'
patched:
  - langgraph-sdk 0.4.4
published: '2026-10-02'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T15:08:38.397'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104873'
references:
  - url: >-
      https://github.com/langchain-ai/langgraph/commit/5a77be5e8bec1600ad0a865638d88c1368497559
    label: security-advisories@github.com
  - url: 'https://github.com/langchain-ai/langgraph/releases/tag/sdk==0.4.4'
    label: security-advisories@github.com
  - url: >-
      https://github.com/langchain-ai/langgraph/security/advisories/GHSA-fvww-7h3r-vfhp
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-104873.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-104873'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2545335'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-104873'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104873'
  - url: 'https://github.com/advisories/GHSA-fvww-7h3r-vfhp'
  - url: 'https://github.com/langchain-ai/langgraph'
  - url: 'https://pypi.org/project/langgraph-sdk'
  - url: 'https://access.redhat.com/errata/RHSA-2026:84734'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - ghsa
  - pip
  - osv
epss: 0.00253
epssPercentile: 0.16894
aliases:
  - GHSA-fvww-7h3r-vfhp
  - PYSEC-2026-4240
ecosystem: pip
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-05T14:46:58.849413Z'
cvssSource: cna
scores:
  cna: 7.6
  vendor: 8.1
ingestedAt: '2026-10-02T22:33:09.843Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-104873)

Affected packages:

- `langgraph-sdk >= 0.1.45, <= 0.4.3`

Patched in:

- `langgraph-sdk 0.4.4`

Source: https://github.com/advisories/GHSA-fvww-7h3r-vfhp

## Vendor advisories

- **Red Hat VEX** · Important · affected: Ansible Automation Orchestrator 2026, Exploit Intelligence, Migration Toolkit for Applications 8, OpenShift Lightspeed, Red Hat Enterprise Linux AI (RHEL AI) 3 · no fix planned: Red Hat Enterprise Linux AI (RHEL AI) 3, Ansible Automation Orchestrator 2026, Exploit Intelligence, Migration Toolkit for Applications 8, … · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-104873.json)
- **RHSA-2026:84734** · Red Hat · fixed in: Red Hat OpenShift AI 3.4 · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84734)