{"id":"CVE-2026-64849","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-64849","generatedAt":"2026-10-31T04:00:51.333Z","title":"MLflow Server-Side Request Forgery Vulnerability","description":"MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Starting in 3.3.0 and 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":"2026-08-17T22:17:24.000Z","lastModified":"2026-10-26T13:10:00.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.3,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N"},"cwe":["CWE-918"],"affected":["lfprojects/mlflow"],"epss":{"score":0.10017,"percentile":0.95608,"date":"2026-10-30","history":[{"date":"2026-09-24","score":0.09839,"percentile":0.95388}]},"kev":{"listed":true,"dateAdded":"2026-08-19","dueDate":"2026-09-02","knownRansomwareCampaignUse":"Unknown","notes":"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.\nhttps://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"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 2 September 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-10-22T00:00:00.000Z","detail":{"to":0.10017,"from":0.09839,"percentile":0.9561},"summary":"EPSS moved from 9.8% to 10.0% probability of exploitation in the next thirty days."}],"references":[{"url":"https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/mlflow/mlflow/issues/24179","tags":["Exploit","Issue Tracking","Mitigation"],"source":"security-advisories@github.com"},{"url":"https://github.com/mlflow/mlflow/pull/24258","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/mlflow/mlflow/releases/tag/v3.15.0","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j","tags":["Exploit","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64849","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}