MLflowGHSA-67c5-x5mf-rppq
MLflow: origin validation error
Fix: upgrade to 3.10.0 or later
In MLflow version 3.9.0, the MLflow Assistant feature introduced improper origin validation in its /ajax-api endpoints. This vulnerability allows a remote attacker to exploit cross-origin requests from a malicious webpage to interact with the MLflow Assistant running on a victim's local machine. By bypassing the loopback-only restriction, the attacker can modify the Assistant's configuration to enable full access, which in turn allows the execution of arbitrary commands via the Claude Code sub-agent. This issue is resolved in version 3.10.0.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| mlflow PyPI | >= 3.9.0, < 3.10.0 | 3.10.0 |
Details and references
- CVSS 3.0
- CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-346, CWE-940
- Also known as
- BIT-mlflow-2026-2611, CVE-2026-2611, PYSEC-2026-418
- nvd.nist.gov/vuln/detail/CVE-2026-2611
- github.com/mlflow/mlflow/commit/8f9c8a53af90842944101eb8b7d60706822c81bc
- access.redhat.com/security/cve/CVE-2026-2611
- bugzilla.redhat.com/show_bug.cgi?id=2479797
- github.com/advisories/GHSA-67c5-x5mf-rppq
- github.com/mlflow/mlflow
- github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-418.yaml
- huntr.com/bounties/8462addd-b464-4a84-b6a2-5529604e6e5a
- pypi.org/project/mlflow