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CVE-2026-50186— 4gaBoards: Path Traversal leading to Arbitrary File Read and Deletion in Board Export

CVSS 8.8 · High EPSS 0.43% · P36

Affected Version Matrix 1

VendorProductVersion RangeStatus
RARgames4gaBoards< 3.3.8affected
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I. Basic Information for CVE-2026-50186

Vulnerability Information
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Vulnerability Title
4gaBoards: Path Traversal leading to Arbitrary File Read and Deletion in Board Export
Source: CVE Program / CVE List V5
Vulnerability Description
4gaBoards is a boards system for realtime project management. Prior to 3.3.8, 4gaBoards allows an authenticated project manager to supply traversal sequences in the filename parameter of GET /exports/:id/:filename. In server/api/controllers/boards/download.js, the decoded inputs.filename value is passed to path.join() beneath private/exports/<user_id>/ without containment validation. A crafted value such as ../ can select an arbitrary file readable by the server process, and the file is returned to the attacker. The fileStream close handler then passes the same path to fs.unlink(), deleting the selected file and potentially causing data loss or denial of service. This issue is fixed in version 3.3.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
RAR 4ga Boards 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RAR 4ga Boards是RAR个人开发者的一款用于实时项目管理的简易看板系统。 RAR 4ga Boards 3.3.8之前版本存在路径遍历漏洞，该漏洞源于对filename参数未进行包含验证，攻击者可通过路径遍历读取服务器进程可读的任意文件并删除该文件，可能导致数据丢失或拒绝服务。
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

VendorProductAffected VersionsCPESubscribe
RARgames4gaBoards < 3.3.8 -

II. Public POCs for CVE-2026-50186

#POC DescriptionSource LinkShenlong Link
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 8353 chars
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III. Intelligence Information for CVE-2026-50186

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Patches & Fixes for CVE-2026-50186 (1)

Vendor Advisories for CVE-2026-50186 (1)

Other References for CVE-2026-50186 (1)

Same Patch Batch · RARgames · 2026-08-18 · 4 CVEs total

CVE-2026-501918.8 HIGH4gaBoards: Pre-Account Takeover via SSO Email Linkage
CVE-2026-539587.6 HIGH4gaBoards: SSO Pre-Account Takeover / Hijacking via Mass Assignment
CVE-2026-539596.5 MEDIUM4gaBoards: Mass Information Disclosure (Internal PII Leakage) on /api/users to any authent

IV. Related Vulnerabilities

Same product: 4gaBoards
Same vendor: RARgames
Same weakness: CWE-22

V. Comments for CVE-2026-50186

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