{"id":"CVE-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":["BIT-mlflow-2026-64849","GHSA-7gwp-5pfp-969j","PYSEC-2026-3687"],"modified":"2026-08-22T03:30:51.075126854Z","published":"2026-08-17T21:16:10.612Z","database_specific":{"cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64849.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/mlflow/mlflow/releases/tag/v3.15.0"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64849.json"},{"type":"ADVISORY","url":"https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64849"},{"type":"REPORT","url":"https://github.com/mlflow/mlflow/issues/24179"},{"type":"FIX","url":"https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939"},{"type":"FIX","url":"https://github.com/mlflow/mlflow/pull/24258"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mlflow/mlflow","events":[{"introduced":"0"},{"fixed":"d0f31520ec4af7c4deaa9a8e7904c442fb1b310d"},{"fixed":"ba949522477cbd5915aa55d29b0cfad7d5ddf939"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.15.0"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*"}}],"versions":["ts/v0.3.0","ts/v0.3.0-rc.0","ts/v0.2.0","ts/v0.2.0-rc.2","ts/v0.2.0-rc.1","model-catalog/latest","nightly","v3.0.0","v2.2.0","v1.7.0","1.0.0","v0.8.1","v0.8.0","v0.7","v0.6.0","v0.5.0","v0.4.2","v0.4.1","v0.4.0","v0.3.0","v0.2.1","v0.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64849.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N"}]}