ePA 3.x Integration: TLS Certificate Verification Universally Disabled

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-50578
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-18 17:16:58 UTC
Updated2026-08-18 18:18:15 UTC
DescriptionePA 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem Types: CWE-295 | CWE-295 CWE-295: Improper Certificate Validation

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fbeta-GmbH EPA3-Service-OpenSource affected < 1.3.0 Not specified

References

ReferenceSourceLinkTags
github.com/fbeta-GmbH/ePA3-Service-OpenSource/commit/0d94a76aa4d57a849f0... [email protected] github.com
github.com/fbeta-GmbH/ePA3-Service-OpenSource/security/advisories/GHSA-j... [email protected] github.com
github.com/fbeta-GmbH/ePA3-Service-OpenSource/releases/tag/1.3.0 [email protected] github.com
www.machinespirits.de/advisory/4b68b0 [email protected] www.machinespirits.de
github.com/fbeta-GmbH/ePA3-Service-OpenSource/pull/9 [email protected] github.com
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