CVE-2026-0545
CriticalPublic exploitmlflow: FastAPI job endpoints under /ajax-api/3.0/jobs/* are not protected by authentication or authorization
Published Apr 3, 2026 · Updated Sep 10, 2026 · Also known as GHSA-7qhf-v65m-g5f3, PYSEC-2026-419
Key Facts
Patch immediately- CVE-2026-0545 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Mlflow (Lfprojects), mlflow-fips (chainguard), rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9:1787073866 (redhat) and 13 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 4.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including Mlflow 3.12.0-r0, Mlflow 3.16.0-r0, mlflow-fips 3.11.1-r0.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
4.4%
Higher than 91.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-0545 brief as a PDF
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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 Products
19 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| MlflowLfprojects | See advisory | 3.16.0-r0 |
| mlflow-fipschainguard | See advisory | 3.11.1-r0 |
| rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9:1787073866redhat | See advisory | n/a |
| rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9:1787073873redhat | See advisory | n/a |
| rhoai/odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-rhel9:1787073459redhat | See advisory | n/a |
Patched Releases
Mlflow
3.12.0-r0, 3.16.0-r0
mlflow-fips
3.11.1-r0
Timeline
Publicly disclosed
Apr 3, 2026
Last updated
Sep 10, 2026
Weakness Type
- CWE-306 Missing Authentication for Critical Function
References
- advisoryRHSA-2026:60520
- advisoryGHSA advisory
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-0545
- articlehttps://huntr.com/bounties/b2e5b028-9541-4d29-8703-a76f1a3734d8
- otherhttps://access.redhat.com/security/cve/CVE-2026-0545
FAQ
Common Questions.
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.
Affected: Mlflow (Lfprojects); mlflow-fips (chainguard); rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9:1787073866 (redhat), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Mlflow 3.12.0-r0, Mlflow 3.16.0-r0, mlflow-fips 3.11.1-r0.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
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