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CVE-2026-30942— Flare has a Path Traversal in /api/avatars/[filename]

Quick assessment

Affected
FlintSH Flare
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Flare是Zachary Lowery个人开发者的一个文件共享平台。 Flare 1.7.3之前版本存在路径遍历漏洞，该漏洞源于/api/avatars/[filename]路径遍历，可能导致任意文件读取。

AI Predicted 8.6 Difficulty: Easy EPSS 0.57% · P45
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I. Basic Information for CVE-2026-30942

Vulnerability Information
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Vulnerability Title
Flare has a Path Traversal in /api/avatars/[filename]
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Flare 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flare是Zachary Lowery个人开发者的一个文件共享平台。 Flare 1.7.3之前版本存在路径遍历漏洞，该漏洞源于/api/avatars/[filename]路径遍历，可能导致任意文件读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FlintSH Flare < 1.7.3 -

II. Public POCs for CVE-2026-30942

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III. Intelligence Information for CVE-2026-30942

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Patches & Fixes for CVE-2026-30942 (1)

Vendor Advisories for CVE-2026-30942 (1)

Vendor Pages for CVE-2026-30942 (1)

IV. Related Vulnerabilities

Same product: Flare
Same vendor: FlintSH
Same weakness: CWE-22

V. Comments for CVE-2026-30942

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