CVE-2026-48189: Otrs

Medium severity, CVSS 5.7. EPSS: 0.3% chance of exploitation in the next 30 days.

An improper Input Validation vulnerability in OTRS Customer Backend module allows to access customer information which are restricted to other groups. Please note that the feature has to be anabled and CustomerGroupSupport has to be used to be affected. This issue affects OTRS: * 7.0.X * 8.0.X * 2023.X * 2024.X * 2025.X * 2026.X before 2026.4.X

Affected products

• Otrs Otrs: from 7.0.0, up to and including 8.0.37; from 2023.0.0, before 2026.4.1 (fixed in 2026.4.1)

Published 2026-06-01. Last modified 2026-07-22.