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TLS Certificate Validation Disabled in Production

High
thomasrichner-oviva published GHSA-5hhf-xmfx-4vvr May 11, 2026

Package

maven com.oviva.telematik:epa4all-client (Maven)

Affected versions

<1.2.2

Patched versions

1.2.2
docker ghcr.io/oviva-ag/epa4all-rest-service (docker)
<1.2.2
1.2.2

Description

Impact

An attacker on the network path between the ePA service and the Konnektor can present
any TLS certificate (self-signed, expired, wrong CN) and intercept all SOAP traffic. This
includes patient identifiers (KVNR), SMC-B card operations (authentication, signing),
document content, and credential exchanges.

Patches

#36

Workarounds

Use the library directly instead of the REST wrapper.

References

  • MS-OVIVA-EPA4ALL-771a78

Credits

Machine Spirits (contact@machinespirits.de)

  • Dr. rer. nat. Simon Weber
  • Dipl.-Inf. Volker Schönefeld
  • Chiara Fliegner

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVE ID

CVE-2026-45574

Weaknesses

Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate. Learn more on MITRE.

Credits