CVE-2026-48189 PUBLISHED

Bypass DedicatedAgentToCustomerGroups Setting

Assigner: OTRS
Reserved: 21.05.2026 Published: 01.06.2026 Updated: 01.06.2026

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

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
CVSS Score: 5.7

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	None
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	OTRS AG
Product	OTRS
Versions	Default: affected Version 7.0.x is affected Version 8.0.x is affected Version 2023.x is affected Version 2024.x is affected Version 2025.x is affected affected from 2026.x to 2026.3.x (incl.)

Solutions

Update to OTRS 2026.4.1. or later. Please note that there will be no OTRS 7 patches

References

https://otrs.com/release-notes/otrs-security-advisory-2026-03/

Problem Types

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor CWE

Impacts

CAPEC-54 Query System for Information