CVE-2026-41182— LangSmith SDK: Streaming token events bypass output redaction

LangSmith SDK: Streaming token events bypass output redaction

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to version 0.5.19 of the JavaScript SDK and version 0.7.31 of the Python SDK, the LangSmith SDK's output redaction controls (hideOutputs in JS, hide_outputs in Python) do not apply to streaming token events. When an LLM run produces streaming output, each chunk is recorded as a new_token event containing the raw token value. These events bypass the redaction pipeline entirely — prepareRunCreateOrUpdateInputs (JS) and _hide_run_outputs (Python) only process the inputs and outputs fields on a run, never the events array. As a result, applications relying on output redaction to prevent sensitive LLM output from being stored in LangSmith will still leak the full streamed content via run events. Version 0.5.19 of the JavaScript SDK and version 0.7.31 of the Python SDK fix the issue.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

信息暴露

LangSmith Client SDKs 信息泄露漏洞

LangSmith Client SDKs是LangChain开源的一个开发者工具包。 LangSmith Client SDKs存在信息泄露漏洞，该漏洞源于输出编辑控制不适用于流式token事件，可能导致敏感LLM输出泄露。

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