Cyber Resilience

CVE-2026-41418

Published
24 April 2026
Modified
27 April 2026
CVSS Score v3.1 5.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS Score 0.0020 10th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-41418 is a medium-severity Observable Timing Discrepancy (CWE-208) vulnerability. Its CVSS base score is 5.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Account Discovery (T1087); ranked at the 10th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and IA-2 (Identification and Authentication (Organizational Users)) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

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…

more

(~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.

CWE(s)
CWE-208

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1087 Account Discovery Discovery
Adversaries may attempt to get a listing of valid accounts, usernames, or email addresses on a system or within a compromised environment.
attack.mitre.org →
Why these techniques?

Timing side-channel enables valid account/username enumeration on login endpoint, directly facilitating Account Discovery (T1087).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-41263Shared CWE-208
CVE-2026-41161Shared CWE-208
CVE-2026-21840Shared CWE-208
CVE-2026-48011Shared CWE-208
CVE-2026-32702Shared CWE-208
CVE-2026-40263Shared CWE-208
CVE-2026-54685Shared CWE-208
CVE-2026-48859Shared CWE-208
CVE-2026-39321Shared CWE-208
CVE-2026-44368Shared CWE-208

Affected Assets

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • IA-2 Identification and Authentication (Organizational Users)
  • AC-3 Access Enforcement
  • IA-6 Authentication Feedback
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V11.2.4

Mitigating Controls (NIST 800-53 r5) AI

IA-2 Identification and Authentication (Organizational Users) good match
prevent

Requires secure identification and authentication mechanisms that must not leak valid account existence through observable timing differences during credential verification.

AC-3 Access Enforcement good match
prevent

Enforces access decisions at the login endpoint without permitting side-channel leakage that reveals whether an account is present before password checking occurs.

IA-6 Authentication Feedback partial match
prevent

Obscures authentication feedback so that timing variations from bcrypt operations versus immediate rejection cannot be used to enumerate users.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require constant-time implementations that eliminate observable timing discrepancies.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.17 Clock synchronization none match
none

Consistent reference clocks limit the attacker's ability to measure or manipulate timing differences that could reveal internal state or processing paths.

References