{"id":"BIT-mlflow-2026-64849","summary":"MLflow: Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding)","details":"MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, the unauthenticated POST /api/2.0/mlflow/webhooks/{id}/test endpoint calls _validate_webhook_url() in mlflow/utils/validation.py only for the original URL while mlflow/webhooks/delivery.py follows redirects and re-resolves the hostname without pinning the validated address, allowing attackers to reach internal or cloud metadata services and receive response_status and response_body. This issue is fixed in version 3.15.0.","aliases":["CVE-2026-64849","GHSA-7gwp-5pfp-969j","PYSEC-2026-3687"],"modified":"2026-09-08T08:48:13.628717296Z","published":"2026-08-21T05:51:48.507Z","database_specific":{"cpes":["cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*"],"severity":"Critical"},"references":[{"type":"FIX","url":"https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939"},{"type":"EVIDENCE","url":"https://github.com/mlflow/mlflow/issues/24179"},{"type":"FIX","url":"https://github.com/mlflow/mlflow/pull/24258"},{"type":"ARTICLE","url":"https://github.com/mlflow/mlflow/releases/tag/v3.15.0"},{"type":"ADVISORY","url":"https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64849"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849"}],"affected":[{"package":{"name":"mlflow","ecosystem":"Bitnami","purl":"pkg:bitnami/mlflow"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.15.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/mlflow/BIT-mlflow-2026-64849.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N"}]}],"schema_version":"1.9.0"}