4ga Boards CVE-2026-41418

| EUVD-2026-25612 MEDIUM
Observable Timing Discrepancy (CWE-208)
2026-04-24 GitHub_M
5.3
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch available
Apr 24, 2026 - 21:02 EUVD
Analysis Generated
Apr 24, 2026 - 19:46 vuln.today

DescriptionNVD

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.

AnalysisAI

4ga Boards prior to version 3.3.5 leaks valid usernames and email addresses through response timing analysis on the login endpoint. An unauthenticated attacker can distinguish between invalid credentials (where the username/email does not exist) and valid credentials with an incorrect password by measuring response times, with a ~4.4× timing difference detectable in a single request over the network. …

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CVE-2026-41418 vulnerability details – vuln.today

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