critical9.6
CVE-2026-2611
MLflow: Improper Origin Validation in MLflow Assistant /ajax-api Endpoints Enables Browser-Mediated Local Command Execution
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | mlflow | = 3.9.0 | 3.10.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Lfprojects | Mlflow | from 3.9.0 before 3.10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/mlflow/mlflow/commit/8f9c8a53af90842944101eb8b7d60706822c81bc
- https://huntr.com/bounties/8462addd-b464-4a84-b6a2-5529604e6e5a
- https://access.redhat.com/security/cve/CVE-2026-2611
- https://bugzilla.redhat.com/show_bug.cgi?id=2479797
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2611.json
- https://github.com/advisories/GHSA-67c5-x5mf-rppq
- https://nvd.nist.gov/vuln/detail/CVE-2026-2611
- https://github.com/mlflow/mlflow
- https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-418.yaml
- https://pypi.org/project/mlflow