GHSA-RVHJ-8CHJ-8V3C

Vulnerability from github – Published: 2026-03-31 15:31 – Updated: 2026-04-04 05:32
VLAI?
Summary
Mflow: Command Injection when serving models with enable_mlserver=True
Details

A command injection vulnerability exists in Mflow 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.

Severity ?
9.6 (Critical)
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "mflow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-0596"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-04T05:32:07Z",
    "nvd_published_at": "2026-03-31T15:16:10Z",
    "severity": "CRITICAL"
  },
  "details": "A command injection vulnerability exists in Mflow 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.",
  "id": "GHSA-rvhj-8chj-8v3c",
  "modified": "2026-04-04T05:32:07Z",
  "published": "2026-03-31T15:31:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0596"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mlflow/mlflow/pull/19738"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mlflow/mlflow/commit/202fac4c83ccc8544c087c142b80196d0e60695c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mlflow/mlflow"
    },
    {
      "type": "WEB",
      "url": "https://huntr.com/bounties/2e905add-f9f5-4309-a3db-b17de5981285"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Mflow: Command Injection when serving models with enable_mlserver=True"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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