{"id":"CVE-2026-30942","summary":"Flare has a Path Traversal in /api/avatars/[filename]","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.","aliases":["GHSA-h639-p7m9-mpgp"],"modified":"2026-04-10T05:42:03.931893Z","published":"2026-03-10T16:44:10.305Z","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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/flintsh/flare","events":[{"introduced":"0"},{"fixed":"2943ae9650e3ad57afae516aa3dcfc0cc22c0fba"}]}],"versions":["rolling","v1.0.0","v1.1.0","v1.1.1","v1.2.0","v1.2.1","v1.3.0","v1.3.1","v1.4.0","v1.4.1","v1.4.2","v1.5.0","v1.5.1","v1.5.2","v1.6.0","v1.6.1","v1.6.2","v1.7.0","v1.7.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30942.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","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"}]}