CVE-2026-0545

CRITICAL NUCLEI

Missing Authentication for Critical Function in mlflow/mlflow

Title source: cna
STIX 2.1

Exploitation Summary

CVE-2026-0545 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.

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.

Nuclei Templates (1)

MLflow Job API - Authentication Bypass
CRITICALVERIFIEDby DhiyaneshDk
Shodan: title:"MLflow"
FOFA: title="MLflow"

Scores

CVSS v3 9.8
EPSS 0.0398
EPSS Percentile 89.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-306
Status published
Products (3)
lfprojects/mlflow
mlflow/mlflow/mlflow unspecified - latest
pypi/mlflow 0PyPI
Published Apr 03, 2026
Tracked Since Apr 03, 2026