CVE-2026-48189: An improper Input Validation vulnerability in OTRS Customer Backend module allows to access customer information which are restricted to other groups. Please…

PriorityP432medium5.7CVSS 3.1

AVNACLPRLUIRSUCHINAN

EPSS

0.34%

26.5th percentile

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

8 ranges

Vendor	Product	Version range	Fixed in
otrs	otrs	>= 2023.0.0 < 2026.4.1	2026.4.1
otrs	otrs	7.0.0 – 8.0.37	—
otrs_ag	otrs	—	—
otrs_ag	otrs	—	—
otrs_ag	otrs	—	—
otrs_ag	otrs	—	—
otrs_ag	otrs	—	—
otrs_ag	otrs	2026.x – 2026.3.x	—

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