SeldonIO MLServer environment_tarball env.py _extract_env path traversal

{
  "id": "9d1dd864f63c53a9b8ffc3d21a4e1e0e678c2e610177fb939f83278bbafda813",
  "url": "https://osv.dev/vulnerability/CVE-2026-109156",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SeldonIO MLServer environment_tarball env.py _extract_env path traversal",
    "summary": "A vulnerability has been found in SeldonIO MLServer up to 1.6.1. Affected is the function _extract_env of the file mlserver/env.py of the component environment_tarball Handler. Such manipulation leads to path traversal. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.",
    "evidence": "osv:CVE-2026-109156",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-109156",
      "aliases": [
        "CVE-2026-109156"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/seldonio/mlserver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "09637a8d618f70bbc23c3ed945bd4627b13419b1"
                },
                {
                  "last_affected": "0eeaa062f66e90360b9ff6c6c90d6188cd1d412e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.6.0"
                      },
                      {
                        "last_affected": "1.6.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.6.1"
                      },
                      {
                        "last_affected": "1.6.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.6.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.6.0",
            "1.6.1",
            "stable",
            "1.6.1.rc2",
            "1.6.1.rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109156.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:34.536689653Z",
      "provider": "osv",
      "references": [
        "https://github.com/SeldonIO/MLServer/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109156.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-109156",
        "https://vuldb.com/cve/CVE-2026-109156",
        "https://vuldb.com/submit/978677",
        "https://vuldb.com/vuln/416889",
        "https://github.com/SeldonIO/MLServer/issues/2553",
        "https://vuldb.com/vuln/416889/cti"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "VulDB",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109156.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-109156",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 502000,
  "published_at": "2026-10-13T10:30:17.244+00:00"
}