CVE-2026-44900

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.

PUBLISHED Reserved 2026-05-07 | Published 2026-05-26 | Updated 2026-05-28 | Assigner GitHub_M

Problem types

CWE-295: Improper Certificate Validation

Product status

References

github.com/...client/security/advisories/GHSA-g8r3-5hwf-qp96

github.com/oviva-ag/epa4all-client/pull/34

cve.org (CVE-2026-44900)

nvd.nist.gov (CVE-2026-44900)

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