CVE-2026-48189 Bypass DedicatedAgentToCustomerGroups Setting
Attackers can bypass group restrictions to access unauthorized customer information in OTRS when specific support features are enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-48189?
CVE-2026-48189 is a medium-severity missing authorization vulnerability in Otrs Otrs, published on 1 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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
Weakness: CWE-200
Which versions are affected by CVE-2026-48189?
It affects 1 product.
Products include Otrs Otrs.
How do I fix CVE-2026-48189?
No fix has been published for CVE-2026-48189 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-48189 being exploited?
There is no known exploitation of CVE-2026-48189 in the wild and no public exploit code.
Other vulnerabilities in Otrs Otrs
Sources
Also known as GHSA-9prp-8cr9-jvwq.