What’s Vulnerable › Vulnerabilities

CVE-2026-2651: Missing Authorization Validation in mlflow/mlflow

• Severity: critical (CVSS 9.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-05-25 · updated 2026-07-21
• Weakness: CWE-862

Description

A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded. The issue is resolved in version 3.10.0.

Affected products

• mlflow/mlflow: through 3.10.1

References

• https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f
• https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc
• https://access.redhat.com/security/cve/CVE-2026-2651
• https://bugzilla.redhat.com/show_bug.cgi?id=2481117
• https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2651.json

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