CVE-2026-0545

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://huntr.com/bounties/b2e5b028-9541-4d29-8703-a76f1a3734d8	Exploit Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:60520
https://access.redhat.com/security/cve/CVE-2026-0545
https://bugzilla.redhat.com/show_bug.cgi?id=2454889
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0545.json

Configurations

Configuration 1 (hide)

cpe:2.3:a:lfprojects:mlflow:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-03 18:16

Updated : 2026-08-28 16:17

NVD link : CVE-2026-0545

Mitre link : CVE-2026-0545

CVE.ORG link : CVE-2026-0545

JSON object : View

Products Affected

lfprojects

mlflow

CWE

CWE-306

Missing Authentication for Critical Function

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`/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."}, {"lang": "es", "value": "En mlflow/mlflow, los endpoints de trabajo de FastAPI bajo /ajax-api/3.0/jobs/* no est\u00e1n protegidos por autenticaci\u00f3n ni autorizaci\u00f3n cuando la aplicaci\u00f3n basic-auth est\u00e1 habilitada. Esta vulnerabilidad afecta a la \u00faltima versi\u00f3n del repositorio. Si la ejecuci\u00f3n de trabajos est\u00e1 habilitada (MLFLOW_SERVER_ENABLE_JOB_EXECUTION=true) y cualquier funci\u00f3n de trabajo est\u00e1 en la lista de permitidos, cualquier cliente de red puede enviar, leer, buscar y cancelar trabajos sin credenciales, omitiendo basic-auth por completo. Esto puede llevar a ejecuci\u00f3n remota de c\u00f3digo no autenticada si los trabajos permitidos realizan acciones privilegiadas como la ejecuci\u00f3n de shell o cambios en el sistema de archivos. Incluso si los trabajos se consideran seguros, esto sigue constituyendo una omisi\u00f3n de autenticaci\u00f3n, lo que podr\u00eda resultar en correo no deseado de trabajos, denegaci\u00f3n de servicio (DoS) o exposici\u00f3n de datos en los resultados de los trabajos."}], "lastModified": "2026-08-28T16:17:03.240", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:lfprojects:mlflow:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F18F1880-033C-4E18-913C-6C5356427ABB"}], "operator": "OR"}]}], "sourceIdentifier": "security@huntr.dev"}