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CVE PROGRAM SOURCE RECORD8.1 High

CVE-2026-44900

epa4all-client: VAU Signature bypass

Description

epa4all-client is the Java Client for epa4all / ePA 3.0 in the Telematik Infrastruktur. Prior to 1.2.1, in SignedPublicKeysTrustValidatorImpl.isTrusted(), the ECDSA signature verification at line 45 discards the boolean return value of Signature.verify(). The method performs certificate chain validation, OCSP check, and signature algorithm setup, but never checks whether the signature actually matches. For any structurally valid signature, it returns true. This vulnerability is fixed in 1.2.1.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

oviva-ag epa4all-client

  • < 1.2.1affected

com.oviva.telematik epa4all-client

  • < 1.2.1affected

References