[renovate]

This PR contains the following updates:

Package	Type	Update	Change	OpenSSF
langgraph-sdk (source)	uv.lock	patch	0.4.4 → 0.4.6

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LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests

CVE-2026-118667 / GHSA-3fx2-cqw9-xr3c

More information

Details

Summary

The LangGraph Python SDK v3 streaming client interpolates caller-supplied thread_id and assistant_id values into request paths without encoding them at four synchronous and asynchronous call sites. Relative path segments can therefore redirect an authenticated GET request to another path on the same configured server.

Details

The affected get_tree and _fetch_state implementations build request paths from raw identifiers rather than passing each identifier through the SDK's existing _quote_path_param helper. HTTP path normalization can collapse values containing relative segments before dispatch while retaining the client's authentication headers.

langgraph-sdk versions 0.4.0 through 0.4.5 are affected. The v3 stream module is not present in the 0.3.x release line.

RemoteGraph v3 streaming in langgraph 1.2.3 and later is also affected when used with a vulnerable langgraph-sdk version. It passes config["configurable"]["thread_id"] into threads.stream(...), and its dependency range permits affected SDK versions.

Impact

An application is affected only if it passes attacker-controlled text as a streaming thread_id or assistant_id. In that configuration, an attacker may select another readable path on the configured server and cause the SDK to return that response to the application. Through thread_id, the attacker can also control the query string, for example by targeting /store/items?namespace=...&key=...; assistant_id controls only the path. The affected requests are GET operations, so this issue does not provide a write primitive.

The LangGraph Platform is not exposed to this issue.

Remediation

Upgrade langgraph-sdk to version 0.4.6 or later. The fix encodes assistant_id in get_tree and thread_id in _fetch_state with _quote_path_param in both synchronous and asynchronous stream modules.

If you use RemoteGraph, also upgrade langgraph to version 1.2.14 or later, which requires langgraph-sdk>=0.4.6.

Severity

• CVSS Score: 4.3 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

• https://github.com/langchain-ai/langgraph/security/advisories/GHSA-3fx2-cqw9-xr3c
• https://github.com/langchain-ai/langgraph/pull/9213
• https://github.com/langchain-ai/langgraph/commit/d89c7e100ec6fc1512544d23b0a7c5169699ef3e
• https://github.com/langchain-ai/langgraph/releases/tag/1.2.14
• https://github.com/langchain-ai/langgraph/releases/tag/sdk%3D%3D0.4.6
• https://github.com/advisories/GHSA-3fx2-cqw9-xr3c

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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Release Notes

langchain-ai/langgraph (langgraph-sdk)

v0.4.6

Compare Source

Changes since 0.4.5

• 0.4.6
• Fix
• Lint
• Add sync test
• Fix
• Fix exception handling for imperative tasks
• prebuilt: release 0.2.1 (#​4801)
• prebuilt: release 0.2.0 (#​4793)
• Code review
• feat(langgraph): push_messages should directly write to the state
• feat(graph): add push_message method to push manually to messages / message-tuple stream (#​4722)
• Add message state test
• Apply same condition for stream_mode=values in suppress interrupt
• Remove redundant cast
• feat(graph): add push_message method to push manually to messages / message-tuple stream
• Last uv.lock?
• Only emit stream values chunks when the output channels have changed (#​4774)
• docs: fix example pregel reducer (#​4740)
• prebuilts hitl: fix branching logic + add structural snapshot tests (#​4767)
• docs: deferred nodes (#​4759)
• Remove local_write utility (#​4751)
• Print output for cached @​task functions (#​4750)
• Print output for cached @​task functions
• sqlite: Add test for search with list filters (#​4747)
• sqlite: update list_namespaces with max_depth (#​4746)
• Update lockfile
• docs: Clean up adjective use in readme (#​4734)
• SqliteStore (#​3608)
• ci: fix benchmark command (#​4729)
• docs: document tuples in streaming guides (#​4690)
• ci: migrate to uv! (#​4698)

v0.4.5

Compare Source

Changes since 0.4.4

• langgraph: release 0.4.5 (#​4709)
• Improve how we match cached writes for async imperative tasks (#​4691)
• Lint
• Improve how we match cached writes for async imperative tasks

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