SSRF in Lfprojects Mlflow
CVE-2026-64849
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.098 (95.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.164 · newest: 0.098 · change: -0.066
Affected products
- Lfprojects Mlflow
- Mlflow — versions < 3.15.0, >= 3.3.0, < 3.15.0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
References
- github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j (Exploit, Vendor Advisory)
- github.com/mlflow/mlflow/issues/24179 (Exploit, Mitigation, Issue Tracking)
- github.com/mlflow/mlflow/pull/24258 (Patch, Issue Tracking)
- github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939 (Patch)
- github.com/mlflow/mlflow/releases/tag/v3.15.0 (Release Notes)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2026-64849?
- CVE-2026-64849 is a critical-severity vulnerability in Lfprojects Mlflow, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.3/10. Published 2026-08-17.
- How severe is CVE-2026-64849?
- Critical severity. CVSS v3 base score is 9.3 out of 10.
- Is CVE-2026-64849 known to be exploited?
- Yes. CVE-2026-64849 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-19), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.