CVE-2026-64849 Details
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.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 20, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849 | CISA-ADP | US Government Resource |
| https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939 | [email protected] | Patch |
| https://github.com/mlflow/mlflow/issues/24179 | [email protected] | ExploitIssue TrackingMitigation |
| https://github.com/mlflow/mlflow/pull/24258 | [email protected] | Issue TrackingPatch |
| https://github.com/mlflow/mlflow/releases/tag/v3.15.0 | [email protected] | Release Notes |
| https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j | [email protected] | ExploitVendor Advisory |
This CVE is in CISA's Known Exploited Vulnerabilities Catalog
Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.
| Vulnerability Name | Date Added | Due Date | Required Action |
|---|---|---|---|
| MLflow Server-Side Request Forgery Vulnerability | Aug 19, 2026 | Sep 2, 2026 | 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. |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-918 | Server-Side Request Forgery (SSRF) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| lfprojects mlflow | < 3.15.0 |
CPE
Remediation
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Change History
8 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 20, 2026 | CVE Modified | CISA-ADP |
| Aug 20, 2026 | CVE Modified | CISA-ADP |
| Aug 19, 2026 | Initial Analysis | [email protected] |
| Aug 19, 2026 | CVE CISA KEV Update | Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government |
| Aug 19, 2026 | CVE Modified | CISA-ADP |
| Aug 19, 2026 | CVE Modified | CISA-ADP |
| Aug 18, 2026 | CVE Modified | CISA-ADP |
| Aug 17, 2026 | New CVE Received | [email protected] |