CVE-2026-54342
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
In epa4all prior to version 2026-05-20, an attacker on the network path can present a self-signed TLS certificate and intercept the connection. For non-VAU connections, this allows direct read and modification of inner traffic, including smartcard operations and OIDC authentication exchanges.
Risk Assessment
The organization risks interception and modification of sensitive traffic, including authentication data and smartcard operations, potentially leading to compromise of ePA systems.
Recommendation
It is recommended to immediately update epa4all to version 2026-05-20 or later.
Other vulnerabilities in epa4all
Original NVD description (English source)
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.