CVE-2026-90848: Governikus AusweisApp StartPAOSResponse cross site scripting

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-15 · updated 2026-10-26
Weakness: CWE-79

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.

Affected products

Governikus AusweisApp: 2.5.0, 2.5.1, 2.5.2, 2.5.3, 2.5.4

References

https://turingpoint.de/en/advisories/tp-2026-113/
https://vuldb.com/cve/CVE-2026-90848
https://vuldb.com/submit/925923
https://vuldb.com/vuln/403403
https://vuldb.com/vuln/403403/cti
https://www.Governikus.de/loesungen/kundenprojekte/AusweisApp/

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