CVE-2026-90848 Governikus AusweisApp StartPAOSResponse cross site scripting
Remote attackers can inject malicious scripts via the ResultMessage argument in Governikus AusweisApp, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-90848?
CVE-2026-90848 is a medium-severity cross-site scripting vulnerability in Governikus AusweisApp, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A weakness has been identified in Governikus AusweisApp up to 2.5.4. Affected is an unknown function of the component StartPAOSResponse Handler. Executing a manipulation of the argument ResultMessage can lead to cross site scripting. The attack can be launched remotely. Upgrading to version 2.5.5 is able to address this issue. It is recommended to upgrade the affected component. This CVE was requested by the vendor.
Which versions are affected by CVE-2026-90848?
How do I fix CVE-2026-90848?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-90848 being exploited?
There is no known exploitation of CVE-2026-90848 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-90848, GHSA-492q-f4p6-w72v, UBUNTU-CVE-2026-90848.