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langgraph-sdk: path-segment encoding added to prevent path traversal

langgraph-sdk now applies path-segment encoding to identifier values before interpolating them into request URL templates, preventing path traversal via special

26 Jun 2026Read 1 minSeverity: schedule it

What changed

langgraph-sdk now applies path-segment encoding to identifier values before interpolating them into request URL templates, preventing path traversal via special characters.

Who it affects

Users who pass untrusted identifier values (e.g., from end-user input) into langgraph-sdk methods without validating them as UUIDs.

What to do today

Upgrade langgraph-sdk to the latest patched version and validate identifier values (e.g., as UUIDs) before passing them to SDK methods.

The trail
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