What is the CVSS score of CVE-2026-40742?

CVE-2026-40742 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.0%.

Nelio Ab Testing CVE-2026-40742

EUVD-2026-22895 MEDIUM

Missing Authorization (CWE-862)

2026-04-15 Patchstack

Authentication Bypass Nelio Ab Testing

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from NVD · only source for this CVE.

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

CVSS changed

Apr 15, 2026 - 16:22 NVD

5.3 (MEDIUM)

EUVD ID Assigned

Apr 15, 2026 - 10:45 euvd

EUVD-2026-22895

CVE Published

Apr 15, 2026 - 10:21 nvd

MEDIUM 5.3

DescriptionCVE.org

Missing Authorization vulnerability in Nelio Software Nelio AB Testing nelio-ab-testing allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Nelio AB Testing: from n/a through <= 8.2.8.