Vulnerabilities affecting this package (0)
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This package is not known to be affected by vulnerabilities.
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Vulnerabilities fixed by this package (1)
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VCID-52gv-vrq8-6fc5
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LangSmith SDK: Streaming token events bypass output redaction
## Summary
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.
## Details
**Both JS and Python SDKs are affected.** The same pattern exists in both:
- **JS SDK**: `traceable.ts:997-1003` and `traceable.ts:1044-1050`
- **Python SDK**: `run_helpers.py:1924` and `run_helpers.py:1996`
In both SDKs, `new_token` events with raw `kwargs.token` values are added during streaming, and the redaction pipeline (`hideOutputs` in JS, `hide_outputs` in Python) only processes `inputs`/`outputs` — never `events`.
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CVE-2026-41182
GHSA-rr7j-v2q5-chgv
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