Vulnerability in Com.oviva.telematik Epa4all-Client
CVE-2026-45575
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (3.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- Com.oviva.telematik Epa4all-Client — versions < 1.2.2
- Oviva-Ag Epa4all-Client — versions < 1.2.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-45575?
- CVE-2026-45575 is a high-severity vulnerability in Com.oviva.telematik Epa4all-Client, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.4/10. Published 2026-05-26.
- How severe is CVE-2026-45575?
- High severity. CVSS v3 base score is 7.4 out of 10.