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CVE-2026-64849

9.3 · CRITICALActively Exploited

MLflow is an open source AI engineering platform for agents, large language models, and machine learning models.

Published Aug 17, 2026CWE-918EPSS 9.84%

Overview

CVE-2026-64849 is a critical-severity vulnerability. It was published on August 17, 2026 and has a CVSS 3.1 base score of 9.3 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939GitHubgithub.com/mlflow/mlflow/issues/24179GitHubgithub.com/mlflow/mlflow/pull/24258GitHubgithub.com/mlflow/mlflow/releases/tag/v3.15.0GitHubgithub.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969jCISAwww.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64849?

CVE-2026-64849 is a critical-severity vulnerability. It was published on August 17, 2026 and has a CVSS 3.1 base score of 9.3 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2026-64849?

This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-64849?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-64849?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64849 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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