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Description

In the latest version of mlflow/mlflow, when the `basic-auth` app is enabled, tracing and assessment endpoints are not protected by permission validators. This allows any authenticated user, including those with `NO_PERMISSIONS` on the experiment, to read trace information and create assessments for traces they should not have access to. This vulnerability impacts confidentiality by exposing trace metadata and integrity by allowing unauthorized creation of assessments. Deployments using `mlflow server --app-name=basic-auth` are affected.

PUBLISHED Reserved 2025-12-30 | Published 2026-03-27 | Updated 2026-03-28 | Assigner @huntr_ai




HIGH: 8.1CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Problem types

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Product status

Any version
affected

References

huntr.com/bounties/149fb2f9-ef4b-4136-a25c-20563451904c

cve.org (CVE-2025-15381)

nvd.nist.gov (CVE-2025-15381)

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