Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Flintsh | Flare | < 1.7.3 |
Related Weaknesses (CWE)
References
- https://github.com/FlintSH/Flare/commit/cd894cc480619aef958be5de72b1445222fd8d36Patch
- https://github.com/FlintSH/Flare/releases/tag/v1.7.3ProductRelease Notes
- https://github.com/FlintSH/Flare/security/advisories/GHSA-h639-p7m9-mpgpExploitMitigationVendor Advisory
FAQ
What is CVE-2026-30942?
CVE-2026-30942 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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...
How severe is CVE-2026-30942?
CVE-2026-30942 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-30942?
Check the references section above for vendor advisories and patch information. Affected products include: Flintsh Flare.