VulnerabilityPublished 24 Apr 2026

CVE-2026-41418: RARgames 4gaBoards · Timing Side Channel

Affects RARgames 4gaBoardsSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium : upgrade to 3.3.5 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 3.3.5

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

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade 4gaBoards and rargames/4gaBoards to 3.3.5.

Affected software

Product	Affected	Fixed in
RARgames4gaBoards	Affected <3.3.5	Fixed in 3.3.5
GitHubrargames/4gaBoards`pkg:github/rargames/4gaBoards`Other threats	Affected <3.3.5	Fixed in 3.3.5

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade 4ga Boards to version 3.3.5 or later, where this timing side-channel vulnerability has been fixed. No other mitigation is indicated or required according to the available data.

Description

CVE-2026-41418 is a timing side-channel vulnerability in 4ga Boards versions prior to 3.3.5 that allows user enumeration via the login endpoint. The server responds significantly faster when an invalid username/email is provided compared to a valid username/email with an incorrect password, due to the bcrypt.compareSync() operation. This timing difference is easily detectable over a network with a single request. The vulnerability has a medium severity with a CVSS score of 5.3 and is fixed in version 3.3.5.

Impact

An attacker can determine valid usernames or email addresses registered in the 4ga Boards system by measuring response times from the login endpoint. This user enumeration can facilitate targeted attacks such as phishing or password guessing. The vulnerability does not directly disclose passwords or allow unauthorized access but leaks information about valid user accounts.

Summary

4ga Boards, a realtime project management board system by RARgames, has a timing discrepancy vulnerability (CWE-208) in its login API (POST /api/access-tokens) in versions before 3.3.5. When an invalid username/email is submitted, the server responds immediately (~17ms), whereas for a valid username/email with a wrong password, the server performs a bcrypt.compareSync() operation (~74ms) before responding. This ~4.4× timing difference enables attackers to enumerate valid usernames or emails by measuring response times. The issue is resolved in version 3.3.5.

CWE-208Observable Timing Discrepancy (opens in a new tab)
Base weakness
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.
OWASP Cheat Sheets
Error Handling (opens in a new tab)
Logging (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.4 (opens in a new tab)
V14.3.3 (opens in a new tab)
V7.3.3 (opens in a new tab)
Attack patterns
Cross-Domain Search Timing (opens in a new tab)
Application Fingerprinting (opens in a new tab)
System Footprinting (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

github.com/RARgames/4gaBoards/security/advisories/GHSA-8mj9-p99h-jhxp (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 1 May 2026, 20:41 UTC

WeaknessesCWE-208

Technical details

References

Community reviews

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