CVE-2026-64849MLflow: Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding)
Updated under an hour ago ()
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It affects mlflow and 1 other product. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Aug 19, 2026; federal agencies had to remediate by Sep 2, 2026. Treat that date as your deadline.
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Free account, 1 product
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.
- CVSS
- 9.3 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
- Weakness (CWE)
- CWE-918
- Known exploited
- Added to CISA KEV Aug 19, 2026; federal remediation due Sep 2, 2026Apply 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.
- EPSS (exploitation in the next 30 days)
- 9.84% (percentile 96)
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Oct 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
mlflow mlflow mlflow:mlflow (from the name) | from 3.3.0, < 3.15.0 | CNA record |
lfprojects mlflow lfprojects:mlflow | from 3.3.0 before 3.15.0 | NVD |
References
- https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969jx-refsource-confirm, exploit, vendor-advisory
- https://github.com/mlflow/mlflow/issues/24179x-refsource-misc, exploit, issue-tracking, mitigation
- https://github.com/mlflow/mlflow/pull/24258x-refsource-misc, issue-tracking, patch
- https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939x-refsource-misc, patch
- https://github.com/mlflow/mlflow/releases/tag/v3.15.0x-refsource-misc, release-notes
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.