CVE-2026-0545

Critical · CVSS 9.8

mlflow — Authentication bypass / Missing authentication for critical function (CWE-306) leading to unauthenticated RCE

CVSS: 9.8; nvd
EPSS: —
KEV: No
Class: other; CWE-306, CWE-306

Description

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.

Search profile — drives PoC discovery

Symbols ajax-api/3.0/jobsbasic-authMLFLOW_SERVER_ENABLE_JOB_EXECUTIONFastAPI/ajax-api/3.0/jobs/*job_executionallowlisted

Keywords CVE-2026-0545mlflow authentication bypassmlflow jobs endpoint unauthenticatedmlflow basic-auth bypassmlflow FastAPI job RCEmlflow MLFLOW_SERVER_ENABLE_JOB_EXECUTIONmlflow ajax-api jobs no authmlflow unauthenticated remote code executionmlflow job execution bypass

Versions: latest (at time of disclosure)

References

Status: enriched · ingested 2026-06-30T06:00:22.000Z · profiled 2026-06-30T18:30:14.000Z