PYSEC-2026-424

Mlflow: Command Injection when serving models with enable_mlserver=True

Description

A command injection vulnerability exists in Mlflow when serving a model with `enable_mlserver=True`. The `model_uri` is embedded directly into a shell command executed via `bash -c` without proper sanitization. If the `model_uri` contains shell metacharacters, such as `$()` or backticks, it allows for command substitution and execution of attacker-controlled commands. This vulnerability affects the latest version of mlflow/mlflow and can lead to privilege escalation if a higher-privileged service serves models from a directory writable by lower-privileged users.

Affected packages

References

• https://nvd.nist.gov/vuln/detail/CVE-2026-0596 ADVISORY
• https://github.com/mlflow/mlflow/pull/19738 WEB
• https://github.com/mlflow/mlflow/commit/202fac4c83ccc8544c087c142b80196d0e60695c WEB
• https://github.com/mlflow/mlflow PACKAGE
• https://huntr.com/bounties/2e905add-f9f5-4309-a3db-b17de5981285 WEB
• https://pypi.org/project/mlflow PACKAGE
• https://github.com/advisories/GHSA-rvhj-8chj-8v3c ADVISORY

Sources