{"cve":{"cve_id":"CVE-2026-64849","is_kev":true,"kev_date_added":"2026-08-19","kev_vendor_project":"MLflow","kev_product":"MLflow","kev_vulnerability_name":"MLflow Server-Side Request Forgery Vulnerability","kev_short_description":"MLflow contains a server-side request forgery vulnerability that can allow attackers to reach internal or cloud metadata services and receive response_status and response_body.","kev_required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","kev_due_date":"2026-09-02","kev_known_ransomware":false,"kev_notes":"https://github.com/mlflow/mlflow/pull/24258 ; https://github.com/mlflow/mlflow/issues/24179 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-64849","kev_cwes":["CWE-918"],"epss_score":0.1641,"epss_percentile":0.9674,"epss_as_of":"2026-08-26","description":"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.","published_at":"2026-08-17T21:16:10.612000Z","last_modified_at":"2026-08-20T19:16:57.867000Z","cvss_v3_score":9.3,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":["CWE-918"],"nvd_references":["https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j","https://github.com/mlflow/mlflow/issues/24179","https://github.com/mlflow/mlflow/pull/24258","https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939","https://github.com/mlflow/mlflow/releases/tag/v3.15.0"],"vuln_status":"Analyzed","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-08-17T22:39:44.500610Z","updated_at":"2026-08-22T16:41:57.519540Z"},"effective_severity":"CRITICAL","badges":["kev","poc"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"lfprojects","vendor_name":"lfprojects","product_slug":"mlflow","product_name":"MLflow","version_start":null,"version_start_inclusive":null,"version_end":"3.15.0","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*"},{"vendor_slug":"mlflow","vendor_name":"mlflow","product_slug":"mlflow","product_name":"mlflow","version_start":"< 3.15.0","version_start_inclusive":true,"version_end":"< 3.15.0","version_end_inclusive":true,"cpe23_uri":"cve5:mlflow:mlflow:< 3.15.0:< 3.15.0"}],"exploit_refs":[{"source":"nuclei","kind":"nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-64849.yaml","title":"MLflow Webhook SSRF - Unauthenticated Full-Read via Redirect Bypass","author":"DhiyaneshDk","disclosed_at":null}],"news":[],"references":[{"url":"https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/mlflow/mlflow/issues/24179","source_type":"MISC","tags":[]},{"url":"https://github.com/mlflow/mlflow/pull/24258","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/mlflow/mlflow/releases/tag/v3.15.0","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-08-17T21:16:10.612000Z","label":"CVE published","source":null},{"type":"poc_available","at":"2026-08-18T16:41:27.546054Z","label":"Public PoC available","source":"nuclei"},{"type":"cisa_reported","at":"2026-08-19T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"ssvc_changed","at":"2026-08-19T05:43:27.514677Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-19T05:43:27.514677Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-19T05:43:27.514677Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-19T21:43:27.532233Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-19T21:43:27.532233Z","label":"SSVC decision revised","source":"vulnrichment"}]}