Log in Start free

Vulnerability · Published Apr 3, 2026 · Assigned by @huntr_ai

CVE-2026-0545Missing Authentication for Critical Function in mlflow/mlflow

High 8.1

In plain English

A high-severity missing authentication in mlflow/mlflow from mlflow. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 4.4% (higher than 91% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)4.4%top 8.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Nuclei

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPImlflowno fix listedGHSA-7qhf-v65m-g5f3
PyPImlflowno fix listedPYSEC-2026-419

Affected products (as reported)

VendorProductVersions
mlflow mlflow/mlflow unspecified – through latest

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References