RARgames 4gaBoards up to 3.3.4 Login Endpoint /api/access-tokens bcrypt.compareSync timing discrepancy

Summaryinfo

A vulnerability classified as problematic was found in RARgames 4gaBoards up to 3.3.4. Affected is the function bcrypt.compareSync of the file /api/access-tokens of the component Login Endpoint. Such manipulation leads to timing discrepancy. This vulnerability is traded as CVE-2026-41418. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in RARgames 4gaBoards up to 3.3.4. Affected by this issue is the function bcrypt.compareSync of the file /api/access-tokens of the component Login Endpoint. The manipulation with an unknown input leads to a timing discrepancy vulnerability. Using CWE to declare the problem leads to CWE-208. Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-41418 since 04/20/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 3.3.5 eliminates this vulnerability.

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Productinfo

Type

• Forum Software

Vendor

• RARgames

Name

• 4gaBoards

Version

• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4

Website

• Product: https://github.com/RARgames/4gaBoards/

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