# CVE-2026-64849: MLflow: Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding)

> CVE-2026-64849: MLflow: Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding). CVSS 9.3 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-64849
Last updated: 2026-10-05T13:35:35Z

- Published: 2026-08-17 21:16 UTC · Updated: 2026-10-05 13:35 UTC · Assigner: GitHub\_M
- CVSS: 9.3 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
- EPSS: 10.0%, 96th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-08-19, federal due date 2026-09-02, ransomware use: Unknown
- CWE: CWE-918

## 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.

## CISA 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.

## Affected vendors and products

- mlflow: mlflow

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-64849)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-64849)
- [https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939](https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939)
- [https://github.com/mlflow/mlflow/issues/24179](https://github.com/mlflow/mlflow/issues/24179)
- [https://github.com/mlflow/mlflow/pull/24258](https://github.com/mlflow/mlflow/pull/24258)
- [https://github.com/mlflow/mlflow/releases/tag/v3.15.0](https://github.com/mlflow/mlflow/releases/tag/v3.15.0)
- [https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j](https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-64849 · Markdown: https://rewindex.com/cve/CVE-2026-64849.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-64849 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:54.177Z