PYSEC-2026-2582 LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

Description The LangSmith SDK's prompt pull methods pullprompt / pullpromptcommit in Python, pullPrompt / pullPromptCommit in JS/TS fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime...

PYSEC-2026-2555 LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

Description The LangSmith SDK's prompt pull methods pullprompt / pullpromptcommit in Python, pullPrompt / pullPromptCommit in JS/TS fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime...

PYSEC-2026-2560 LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

Description The LangSmith SDK's prompt pull methods pullprompt / pullpromptcommit in Python, pullPrompt / pullPromptCommit in JS/TS fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime...

CVE-2026-45134

LangSmith CVE-2026-45134 affects LangSmith Client SDKs with prompt-pull methods that fetch/deserialize prompt manifests from LangSmith Hub. The issue allows manifest content to be influenced by external parties when pulling a public prompt (owner/name), because prior SDKs did not distinguish such...

GHSA-3644-Q5CJ-C5C7 LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

Description The LangSmith SDK's prompt pull methods pullprompt / pullpromptcommit in Python, pullPrompt / pullPromptCommit in JS/TS fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime...

PT-2026-40723

Name of the Vulnerable Software and Affected Versions LangSmith SDK Python versions prior to 0.8.0 LangSmith SDK JS/TS versions prior to 0.6.0 Description The prompt pull methods pull prompt and pull prompt commit in Python, and pullPrompt and pullPromptCommit in JS/TS, fetch and deserialize prom...