CVE-2026-41418 — 4ga Boards: User Enumeration via Timing Side-Channel in Authentication Endpoint
4ga Boards is a boards system for realtime project management. Prior to 3.3.5, 4ga Boards is vulnerable to user enumeration via a timing side-channel in the login endpoint (POST…
Published: 2026-04-24 · CVSS: 5.3 · CVSS 3.1
4ga Boards is a boards system for realtime project management. Prior to 3.3.5, 4ga Boards is vulnerable to user enumeration via a timing side-channel in the login endpoint (POST /api/access-tokens). When an invalid username/email is provided, the server responds immediately (~17ms average). When a valid username/email is provided with an incorrect password, the server first performs a bcrypt.compareSync() operation (~74ms average) before responding. This ~4.4× timing difference is trivially detectable even over a network — a single request suffices. This vulnerability is fixed in 3.3.5.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7