CVE-2026-50578

ePA 3.x Integration implements the authorization workflow and writes Medical Information Objects to Germany's electronic patient record. Prior to 1.3.0, ePA 3.x Integration disables TLS certificate verification for both ePA connections in app/vau/VAUProtokoll.py and Konnektor connections in app/konnektor/Konnektor.py. A network-positioned attacker can present an arbitrary certificate, terminate the TLS connection, and intercept ePA traffic. The VAU protocol does not provide an effective fallback because its application-layer certificate validation is also broken in affected versions. The Konnektor session uses self.session.verify set to False while the client authenticates with self.session.cert, so an attacker impersonating the Konnektor can receive the client's mutual TLS certificate exchange and observe smartcard operations. This issue is fixed in version 1.3.0.

• CWE-295

• https://github.com/fbeta-GmbH/ePA3-Service-OpenSource/commit/0d94a76aa4d57a849f0c18fb3d6d337ec2505170
• https://github.com/fbeta-GmbH/ePA3-Service-OpenSource/pull/9
• https://github.com/fbeta-GmbH/ePA3-Service-OpenSource/releases/tag/1.3.0
• https://github.com/fbeta-GmbH/ePA3-Service-OpenSource/security/advisories/GHSA-j9m9-pmwv-hwwr
• https://www.machinespirits.de/advisory/4b68b0

Published

Aug 18, 2026

Last Modified

Sep 8, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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