MLflow: Improper Origin Validation in MLflow Assistant /ajax-api Endpoints Enables Browser-Mediated Local Command Execution
GHSA-67c5-x5mf-rppq · BIT-mlflow-2026-2611 · CVE-2026-2611 · PYSEC-2026-418
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Description
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.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-2611
- WEB https://github.com/mlflow/mlflow/commit/8f9c8a53af90842944101eb8b7d60706822c81bc
- WEB https://access.redhat.com/security/cve/CVE-2026-2611
- WEB https://bugzilla.redhat.com/show_bug.cgi?id=2479797
- ADVISORY https://github.com/advisories/GHSA-67c5-x5mf-rppq
- PACKAGE https://github.com/mlflow/mlflow
- WEB https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-418.yaml
- WEB https://huntr.com/bounties/8462addd-b464-4a84-b6a2-5529604e6e5a
- WEB https://pypi.org/project/mlflow
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