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.
Metrics
Affected Vendors & Products
References
History
Mon, 05 Oct 2026 16:30:00 +0000
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ssvc
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Sat, 03 Oct 2026 00:30:00 +0000
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| Weaknesses | CWE-430 | |
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| Metrics |
threat_severity
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cvssV3_1
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Fri, 02 Oct 2026 21:45:00 +0000
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Langchain-ai
Langchain-ai langgraph |
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| Vendors & Products |
Langchain-ai
Langchain-ai langgraph |
Fri, 02 Oct 2026 20:15:00 +0000
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| 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. | |
| Title | LangGraph SDK custom auth silently ignores actions= on resource decorators | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-10-02T20:06:07.090Z
Updated: 2026-10-05T15:32:10.019Z
Reserved: 2026-10-02T14:59:11.775Z
Link: CVE-2026-104873
Updated: 2026-10-05T14:46:59.597Z
Status : Awaiting Analysis
Published: 2026-10-02T20:17:01.223
Modified: 2026-10-06T15:08:38.397
Link: CVE-2026-104873