Leon before commit 50df142 Path Traversal via /download model Command

{
  "id": "5d0de69f4a6cf1689f802d392fb423c5d2f88700237ab4a16776a54b926e90cf",
  "url": "https://osv.dev/vulnerability/CVE-2026-116073",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Leon before commit 50df142 Path Traversal via /download model Command",
    "summary": "Leon before commit 50df142 contains a path traversal vulnerability in getModelFileNameFromURL() that allows attackers to write files outside the models directory via percent-encoded separators. Attackers can trick a user into running '/download model' with a crafted URL containing encoded '../' sequences to write attacker-controlled content to arbitrary paths writable by Leon.",
    "evidence": "osv:CVE-2026-116073",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-116073",
      "aliases": [
        "CVE-2026-116073"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/leon-ai/leon",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a3afdef81c8dd085b922f5a4e6b68bb9b9d802e4"
                },
                {
                  "fixed": "50df142a89a0859e5b7283d87afdab7b01e712a2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "a3afdef81c8dd085b922f5a4e6b68bb9b9d802e4"
                      },
                      {
                        "fixed": "50df142a89a0859e5b7283d87afdab7b01e712a2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "50df142a89a0859e5b7283d87afdab7b01e712a2"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-116073.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.183293614Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116073.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-116073",
        "https://www.vulncheck.com/advisories/leon-before-commit-50df142-path-traversal-via-download-model-command",
        "https://github.com/leon-ai/leon/issues/593",
        "https://github.com/leon-ai/leon/commit/50df142a89a0859e5b7283d87afdab7b01e712a2",
        "https://github.com/leon-ai/leon/pull/594",
        "https://github.com/leon-ai/leon",
        "https://github.com/leon-ai/leon/blob/21baf11714f618a9367f25882e59e856d3308037/server/src/built-in-command/commands/download-command/download-command.ts#L21-L28"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116073.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116073",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498256,
  "published_at": "2026-10-25T11:51:00.624+00:00"
}