CVE-2026-55236 | langchain-ai langgraph-api up to 0.9.x Run-Creation improper authorization

September 14, 2026 Yanac

A vulnerability, which was classified as critical, was found in langchain-ai langgraph-api up to 0.9.x. This issue affects some unknown processing of the component Run-Creation. Executing a manipulation can lead to improper authorization.

The identification of this vulnerability is CVE-2026-55236. The attack may be launched remotely. There is no exploit available.

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