Epa4all CVEs and Security Vulnerabilities

CVE-2026-54342

TLS Certificate Verification Disabled on CXF Transport Clients in epa4all

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 3.1 · 8.1 High EPSS < 1% KEV · Not listed

Vendors

Med-united

Products

Epa4all

CVE-2026-48021

epa4all Security Incident: Implement keystore based on Telematik TSL, implement hostname check and certificate check for lib-vau

In epa4all, prior to version 2026-05-20, an attacker who can intercept the TLS connection between epa4all and the ePA backend can complete the VAU handshake with attacker-controlled keys and obtain the session encryption keys. All inner HTTP traffic (patient consent decisions, medication data, document operations, authorization tokens, and entitlement queries) becomes readable and modifiable. The attacker can also inject arbitrary requests through the hijacked channel. This issue has been patched in version 2026-05-20.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed