Description
A weakness has been identified in Governikus AusweisApp Desktop 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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Governikus | AusweisApp Desktop | 2.5.0, 2.5.1, 2.5.2, 2.5.3, 2.5.4 | 2.5.5 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ausweisapp2 | 2.5.5-1 | — |
| Debian 13 | ausweisapp2 | No fix yet | — |
| Debian 12 | ausweisapp2 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | ausweisapp2 | No fix yet | — |
| Ubuntu 26.04 LTS | ausweisapp2 | No fix yet | — |
| Ubuntu 24.04 LTS | ausweisapp2 | No fix yet | — |
| Ubuntu 22.04 LTS | ausweisapp2 | No fix yet | — |
| Ubuntu 20.04 LTS | ausweisapp2 | No fix yet | — |
Advisories 1
- WID-SEC-2026-3356 Governikus AusweisApp2: Schwachstelle ermöglicht Cross-Site Scripting BSI CERT-Bund (WID) · Sep 14, 2026
References
- VDB-403403 | Governikus AusweisApp Desktop StartPAOSResponse cross site scripting vdb-entry technical-description
- VDB-403403 | CTI Indicators (IOB, IOC, TTP, IOA) signature permissions-required
- CVE-2026-90848 | CVE Analysis and Report third-party-advisory
- Submit #925923 | Governikus GmbH & Co. KG AusweisApp (Desktop) 2.5.4 Cross Site Scripting third-party-advisory
- https://turingpoint.de/en/advisories/tp-2026-113/ related
- https://www.Governikus.de/loesungen/kundenprojekte/AusweisApp/ patch