Vulnerability Details CVE-2026-30942
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 31.9%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-30942
-
cpe:2.3:a:flintsh:flare:1.0.0
-
cpe:2.3:a:flintsh:flare:1.1.0
-
cpe:2.3:a:flintsh:flare:1.1.1
-
cpe:2.3:a:flintsh:flare:1.2.0
-
cpe:2.3:a:flintsh:flare:1.2.1
-
cpe:2.3:a:flintsh:flare:1.3.0
-
cpe:2.3:a:flintsh:flare:1.3.1
-
cpe:2.3:a:flintsh:flare:1.4.0
-
cpe:2.3:a:flintsh:flare:1.4.1
-
cpe:2.3:a:flintsh:flare:1.4.2
-
cpe:2.3:a:flintsh:flare:1.5.0
-
cpe:2.3:a:flintsh:flare:1.5.1
-
cpe:2.3:a:flintsh:flare:1.5.2
-
cpe:2.3:a:flintsh:flare:1.6.0
-
cpe:2.3:a:flintsh:flare:1.6.1
-
cpe:2.3:a:flintsh:flare:1.6.2
-
cpe:2.3:a:flintsh:flare:1.7.0
-
cpe:2.3:a:flintsh:flare:1.7.1
-
cpe:2.3:a:flintsh:flare:1.7.2