CVE-2026-54342

In epa4all, prior to version 2026-05-20, an attacker on the network path between epa4all and any backend (ePA Aktensystem, Konnektor, IDP, TSS) can present a self-signed TLS certificate and intercept the connection. For non-VAU connections (Konnektor, IDP), this allows direct read and modification of the inner traffic, including smartcard operations and OIDC authentication exchanges. For the ePA backend, the disabled TLS verification is the transport-level enabler for the VAU MITM described in GHSA-vvh7-x6c7-46gh. This issue has been patched in version 2026-05-20.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/med-united/epa4all/releases/tag/2026-05-20
https://github.com/med-united/epa4all/security/advisories/GHSA-296w-v8f6-3rf7
https://github.com/med-united/epa4all/security/advisories/GHSA-vvh7-x6c7-46gh
https://www.machinespirits.com/advisory/b98b02

Configurations

No configuration.

History

24 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) En epa4all, antes de la versión 2026-05-20, un atacante en la ruta de red entre epa4all y cualquier backend (ePA Aktensystem, Konnektor, IDP, TSS) puede presentar un certificado TLS autofirmado e interceptar la conexión. Para conexiones no-VAU (Konnektor, IDP), esto permite la lectura y modificación directa del tráfico interno, incluyendo operaciones de tarjeta inteligente e intercambios de autenticación OIDC. Para el backend de ePA, la verificación TLS deshabilitada es el habilitador a nivel de transporte para el MitM VAU descrito en GHSA-vvh7-x6c7-46gh. Este problema ha sido parcheado en la versión 2026-05-20.

Information

Published : 2026-07-24 19:16

Updated : 2026-10-24 13:10

NVD link : CVE-2026-54342

Mitre link : CVE-2026-54342

CVE.ORG link : CVE-2026-54342

JSON object : View

Products Affected

No product.

CWE

CWE-295

Improper Certificate Validation

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