CVE-2026-45575: Com.oviva.telematik EPA4ALL-Client

High severity, CVSS 7.4. EPSS: 0.2% chance of exploitation in the next 30 days.

epa4all-client is the Java Client for epa4all / ePA 3.0 in the Telematik Infrastruktur. Prior to 1.2.2, an attacker who can MITM the TLS connection between the client and the IDP (within the TI network) can substitute a forged discovery document. The forged document redirects uri_puk_idp_enc and uri_puk_idp_sig to attacker-controlled URLs. The client then encrypts the SMC-B-signed challenge response to the attacker's encryption key and POSTs it to the attacker's auth endpoint. This captures the signed authentication material. This vulnerability is fixed in 1.2.2.

Affected products

• Com.oviva.telematik EPA4ALL-Client: before 1.2.2 (fixed in 1.2.2)
• Oviva-AG EPA4ALL-Client: before 1.2.2 (fixed in 1.2.2)

Published 2026-05-26. Last modified 2026-07-24.