# CVE-2026-127120: Governikus AusweisApp Mobile StartPAOSResponse cross site scripting

Status: published. Published: 2026-11-12. Updated: 2026-11-13.

A vulnerability was found in Governikus AusweisApp Mobile up to 2.5.5. This impacts an unknown function of the component StartPAOSResponse Handler. Performing a manipulation of the argument ResultMessage results in cross site scripting. The attack can be initiated remotely. Upgrading to version 2.6.0 will fix this issue. Upgrading the affected component is advised. This CVE was requested by the vendor.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://www.governikus.de/loesungen/kundenprojekte/AusweisApp/

## Affected products and versions

- Governikus / AusweisApp Mobile: 2.5.0 (affected); 2.5.1 (affected); 2.5.2 (affected); 2.5.3 (affected); 2.5.4 (affected); 2.5.5 (affected); 2.6.0 (unaffected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X; source: CNA: VulDB

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C; source: CNA: VulDB

- CVSS 3.0: 4.3 (medium); CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C; source: CNA: VulDB

- CVSS 2.0: 5 (medium); AV:N/AC:L/Au:N/C:N/I:P/A:N/E:ND/RL:OF/RC:C; source: CNA: VulDB

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: cna@vuldb.com

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N; source: NVD: cna@vuldb.com

- CVSS 2.0: 5 (medium); AV:N/AC:L/Au:N/C:N/I:P/A:N; source: NVD: cna@vuldb.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-79, CWE-94

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://vuldb.com/vuln/436402 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/436402/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-127120 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1033285 (CNA: VulDB; third-party-advisory)

- https://www.governikus.de/loesungen/kundenprojekte/AusweisApp/ (CNA: VulDB; patch)

- https://vuldb.com/cve/CVE-2026-127120 (cna@vuldb.com)

- https://vuldb.com/submit/1033285 (cna@vuldb.com)

- https://vuldb.com/vuln/436402 (cna@vuldb.com)

- https://vuldb.com/vuln/436402/cti (cna@vuldb.com)

- https://www.governikus.de/loesungen/kundenprojekte/AusweisApp/ (cna@vuldb.com)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-127120; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-127120; retrieved 2026-11-13; source updated 2026-11-12

Revision: 1b85724e2d87218601f156ddc71af14162467ffb48e8cd3723d438dc5130373e

Canonical: https://y2.dev/cve/CVE-2026-127120

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