{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.0.21"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "fdd6fd6cca8fb10a25608011a7695fa91093e7ee"
            },
            {
              "fixed": "835843e6d2bf7d018cbb8e50f28f0426eaa20c84"
            }
          ],
          "repo": "https://github.com/heymrun/heym",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45225.json"
  },
  "details": "Heym before 0.0.21 contains a path traversal vulnerability in the file upload endpoint that allows authenticated users to write attacker-controlled files to arbitrary locations by supplying a crafted filename with traversal sequences. Attackers can exploit the unvalidated filename parameter in the upload_file() handler to bypass path restrictions and write, read, or delete files outside the intended storage directory.",
  "id": "CVE-2026-45225",
  "modified": "2026-07-08T05:38:03.397804320Z",
  "published": "2026-05-12T21:09:28.287Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45225.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/heymrun/heym/releases/tag/v0.0.21"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45225"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/heym-path-traversal-file-upload-via-upload-file"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/heymrun/heym/pull/92"
    },
    {
      "type": "FIX",
      "url": "https://github.com/heymrun/heym/commit/835843e6d2bf7d018cbb8e50f28f0426eaa20c84"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/heymrun/heym"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Heym \u003c 0.0.21 Path Traversal File Upload via upload_file()"
}