EUVD-2026-18809
GHSA-7qhf-v65m-g5f3
CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
3Description
In mlflow/mlflow, the FastAPI job endpoints under `/ajax-api/3.0/jobs/*` are not protected by authentication or authorization when the `basic-auth` app is enabled. This vulnerability affects the latest version of the repository. If job execution is enabled (`MLFLOW_SERVER_ENABLE_JOB_EXECUTION=true`) and any job function is allowlisted, any network client can submit, read, search, and cancel jobs without credentials, bypassing basic-auth entirely. This can lead to unauthenticated remote code execution if allowed jobs perform privileged actions such as shell execution or filesystem changes. Even if jobs are deemed safe, this still constitutes an authentication bypass, potentially resulting in job spam, denial of service (DoS), or data exposure in job results.
Analysis
Remote code execution in MLflow's FastAPI job endpoints allows unauthenticated attackers to submit and execute arbitrary jobs when basic-auth is enabled. Network-accessible attackers (CVSS AV:N, PR:N) can bypass authentication entirely on `/ajax-api/3.0/jobs/*` endpoints when `MLFLOW_SERVER_ENABLE_JOB_EXECUTION=true`, executing privileged operations including shell commands and filesystem modifications through allowlisted job functions. …
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Remediation
Within 24 hours: Inventory all MLflow deployments and identify instances with MLFLOW_SERVER_ENABLE_JOB_EXECUTION=true; isolate affected systems from untrusted networks immediately. Within 7 days: Implement network-level access controls restricting /ajax-api/3.0/jobs/* endpoints to authorized internal IP ranges only; review MLflow audit logs for suspicious job submissions. …
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