CVE-2026-64849

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Source
https://cve.org/CVERecord?id=CVE-2026-64849
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64849.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-64849
Aliases
Downstream
Published
2026-08-17T21:16:10Z
Modified
2026-10-28T02:31:00Z
Severity
  • 9.3 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N CVSS Calculator
Summary
MLflow: Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding)
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64849.json"
}
References

Affected packages

Git / github.com/mlflow/mlflow

Affected ranges

Type
GIT
Repo
https://github.com/mlflow/mlflow
Events
Introduced
f2266fa9f4583612aa1eb0ca9b63046f12153ce1
Fixed
d0f31520ec4af7c4deaa9a8e7904c442fb1b310d
Fixed
ba949522477cbd5915aa55d29b0cfad7d5ddf939
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "3.3.0"
                },
                {
                    "fixed": "3.15.0"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "ba949522477cbd5915aa55d29b0cfad7d5ddf939"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v3.15.0",
            "range": [
                {
                    "fixed": "d0f31520ec4af7c4deaa9a8e7904c442fb1b310d"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64849.json"