CVE-2026-64849— MLflow: Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding)
Public Exploits 1
Nuclei · 1 CVE-2026-64849.yaml [template]
In-the-Wild Activity Observed cisa_kev · confirmed
Possible ATT&CK Techniques 2AI
T1592 · Gather Victim Host Information T1071 · Application Layer ProtocolGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-64849
Vulnerability Information
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Vulnerability Title
MLflow: Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
MLflow 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MLflow是MLflow组织开源的一个简化机器学习开发的平台,包括跟踪实验、将代码打包成可重复的运行以及共享和部署模型。 MLflow 3.15.0之前版本存在服务端请求伪造漏洞，该漏洞源于Webhook测试端点未充分验证URL且跟随重定向，可能导致攻击者访问内部或云元数据服务，造成服务端请求伪造。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-64849
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | MLflow > 3.15.0 contains an information disclosure vulnerability caused by improper validation of webhook URLs allowing attackers to reach internal or cloud metadata services and obtain response details, exploit requires unauthenticated access to the webhook test endpoint. | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-64849.yaml | POC Details |
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Patches & Fixes for CVE-2026-64849 (2)
Vendor Advisories for CVE-2026-64849 (1)
Vendor Pages for CVE-2026-64849 (1)
Other References for CVE-2026-64849 (1)
Same Patch Batch · mlflow · 2026-08-17 · 3 CVEs total
| CVE-2026-69148 | 7.1 HIGH | MLflow: CreateModelVersion source validation does not check READ permission on referenced |
| CVE-2026-69146 | 6.5 MEDIUM | MLflow: LogInputs endpoint bypasses per-run UPDATE authorization in basic-auth |
IV. Related Vulnerabilities
Same product: mlflow
- CVE-2026-69146
MLflow: LogInputs endpoint bypasses per-run UPDATE authoriza - CVE-2026-69148
MLflow: CreateModelVersion source validation does not check - CVE-2026-71211
mlflow - Unvalidated Gateway Secret api_base Enables SSRF vi - CVE-2026-13484
MLflow Experiment-scoped Label Schema CRUD API authorization - CVE-2026-10803
MLflow Dataset Digest Computation digest_utils.py mlflow.dat
Same vendor: mlflow
- CVE-2026-69146
MLflow: LogInputs endpoint bypasses per-run UPDATE authoriza - CVE-2026-69148
MLflow: CreateModelVersion source validation does not check - CVE-2026-71211
mlflow - Unvalidated Gateway Secret api_base Enables SSRF vi - CVE-2026-8147
Authorization Bypass in mlflow/mlflow - CVE-2026-4035
Environment Variable Resolution Vulnerability in mlflow/mlfl
Same weakness: CWE-918
- CVE-2026-63311
NLTK before 3.10.0 SSRF via DNS Resolution Failure - CVE-2026-78003
Mailgun for WordPress <= 2.2.0 - Unauthenticated Server-Side - CVE-2026-53509
@aborruso/ckan-mcp-server: SSRF via base_url allows access t - CVE-2026-50288
@asymmetric-effort/specifyjs: URL parse failure silently all - CVE-2026-63004
Unleash: Addon webhook URL is dialed server-side with no int
V. Comments for CVE-2026-64849
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