{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2943ae9650e3ad57afae516aa3dcfc0cc22c0fba"
            }
          ],
          "repo": "https://github.com/flintsh/flare",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-h639-p7m9-mpgp"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30942.json"
  },
  "details": "Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Prior to 1.7.3, an authenticated path traversal vulnerability in /api/avatars/[filename] allows any logged-in user to read arbitrary files from within the application container. The filename URL parameter is passed to path.join() without sanitization, and getFileStream() performs no path validation, enabling %2F-encoded ../ sequences to escape the uploads/avatars/ directory and read any file accessible to the nextjs process under /app/. Authentication is enforced by Next.js middleware. However, on instances with open registration enabled (the default), any attacker can self-register and immediately exploit this. This vulnerability is fixed in 1.7.3.",
  "id": "CVE-2026-30942",
  "modified": "2026-04-01T23:09:59.713681349Z",
  "published": "2026-03-10T16:44:10.305Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FlintSH/Flare/releases/tag/v1.7.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30942.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/FlintSH/Flare/security/advisories/GHSA-h639-p7m9-mpgp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30942"
    },
    {
      "type": "FIX",
      "url": "https://github.com/FlintSH/Flare/commit/cd894cc480619aef958be5de72b1445222fd8d36"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Flare has a Path Traversal in /api/avatars/[filename]"
}