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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/FlintSH/Flare/commit/cd894cc480619aef958be5de72b1445222fd8d36	Patch
https://github.com/FlintSH/Flare/releases/tag/v1.7.3	Product Release Notes
https://github.com/FlintSH/Flare/security/advisories/GHSA-h639-p7m9-mpgp	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:flintsh:flare:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-10 18:18

Updated : 2026-03-18 16:40

NVD link : CVE-2026-30942

Mitre link : CVE-2026-30942

CVE.ORG link : CVE-2026-30942

JSON object : View

Products Affected

flintsh

flare

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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