CVE-2026-78356 Unauthenticated Disclosure of Agent Frontend Configuration
Unauthenticated attackers can access the OTRS Agent Frontend configuration endpoint to retrieve internal application settings and implementation details.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78356?
CVE-2026-78356 is a medium-severity vulnerability in OTRS, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The OTRS Agent Frontend configuration endpoint can be accessed without authentication. This allows unauthenticated remote users to retrieve internal application configuration that is intended for use by the authenticated Agent Frontend. The exposed information may include configured frontend routes and their associated authorization groups, authentication configuration, enabled product features, third-party integration settings, and other implementation details.
The exposed configuration does not directly contain user credentials or provide unauthorized modification of the OTRS configuration. However, the disclosed information may assist an attacker in fingerprinting the affected OTRS installation and identifying enabled functionality or security-relevant configuration that could be used to prepare further attacks.
This issue affects OTRS:
* 8.0.X * 2023.X * 2024.X * 2025.X * 2026.X before 2026.7.X
Weakness: CWE-497
Which versions are affected by CVE-2026-78356?
How do I fix CVE-2026-78356?
No fix has been published for CVE-2026-78356 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-78356 being exploited?
There is no known exploitation of CVE-2026-78356 in the wild and no public exploit code.
Sources
Also known as GHSA-8jjm-2gpw-mmqf, UBUNTU-CVE-2026-78356.