{"id":"CVE-2026-8147","aliases":["GHSA-2cm6-r77w-6g96","BIT-mlflow-2026-8147"],"title":"MLflow: trace API endpoints lack proper authorization validators","summary":"MLflow: trace API endpoints lack proper authorization validators","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","vendor":"mlflow","product":"mlflow","ecosystem":"pip","affected":["mlflow >= 2.14.0rc0, < 3.13.0rc0"],"patched":["mlflow 3.13.0rc0"],"published":"2026-07-02","updated":"2026-08-13","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-2cm6-r77w-6g96","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8147"},{"url":"https://github.com/mlflow/mlflow/pull/23014"},{"url":"https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937"},{"url":"https://github.com/mlflow/mlflow"},{"url":"https://github.com/mlflow/mlflow/releases/tag/v3.13.0"},{"url":"https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5"}],"tags":["osv","pip"],"epss":0.00548,"epssPercentile":0.44757,"ingestedAt":"2026-08-13T19:18:20.303Z","slug":"CVE-2026-8147","body":"## Overview\n\nIn MLflow versions prior to 3.13.0, when running with authentication enabled, the trace API endpoints lack proper authorization validators. This allows any authenticated user to bypass experiment-level authorization controls on all trace operations, including reading, deleting, and modifying traces on experiments they do not have permission to access. The issue arises from the `_before_request` handler, which does not register authorization validators for trace endpoints, resulting in requests proceeding without validation. This vulnerability can expose sensitive data, destroy audit logs, and allow unauthorized modifications.\n\n## Affected packages\n\n- `mlflow >= 2.14.0rc0, < 3.13.0rc0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `mlflow 3.13.0rc0`","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}