--- id: CVE-2026-50186 title: 4gaBoards is a boards system for realtime project management summary: >- 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/controll… severity: high cvss: 8.8 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-22 published: '2026-08-18' updated: '2026-09-09' sourceUpdated: '2026-09-09T21:13:25.910' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50186' references: - url: >- https://github.com/RARgames/4gaBoards/commit/654151d7cc7739e43fd32d368e47bc4090cc65f5 label: security-advisories@github.com - url: 'https://github.com/RARgames/4gaBoards/releases/tag/v3.3.8' label: security-advisories@github.com - url: >- https://github.com/RARgames/4gaBoards/security/advisories/GHSA-rv7w-hhqv-65cf label: security-advisories@github.com - url: >- https://github.com/RARgames/4gaBoards/security/advisories/GHSA-rv7w-hhqv-65cf label: 134c704f-9b21-4f2e-91b3-4a467353bcc0 tags: - nvd epss: 0.00531 epssPercentile: 0.43886 ingestedAt: '2026-09-09T21:22:45.538Z' --- ## Overview 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// 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. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges.