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CVE-2026-44900

epa4all-client: VAU Signature bypass PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
oviva-ag / epa4all-clientaffected < 1.2.1
com.oviva.telematik / epa4all-clientaffected < 1.2.1

CWE

CWE-295

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.