CVE-2026-54342 | In epa4all, prior to version 2026-05-20, an attacker on the … | CVSS 8.1 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-54342
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-12 19:23 UTC
Published: 2026-07-24 18:26 UTC
Last updated: 2026-07-24 18:26 UTC
Primary CWE: CWE-295
CWE-295: Improper Certificate Validation
Vendor / Product: med-united / epa4all
Sources: cve.org · NVD

Severity & Metrics

8.1 HIGH CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
med-united	epa4all	—	< 2026-05-20

Weakness (CWE)

CWE	Source	Description
CWE-295	cna	CWE-295: Improper Certificate Validation

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.1	HIGH	3.1	cna	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References (4)

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