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.
Metrics
Affected Vendors & Products
References
History
Thu, 28 May 2026 16:30:00 +0000
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ssvc
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Wed, 27 May 2026 10:30:00 +0000
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Com.oviva.telematik
Com.oviva.telematik epa4all-client Oviva-ag Oviva-ag epa4all-client |
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| Vendors & Products |
Com.oviva.telematik
Com.oviva.telematik epa4all-client Oviva-ag Oviva-ag epa4all-client |
Tue, 26 May 2026 21:45:00 +0000
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| 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. | |
| Title | epa4all-client: VAU Signature bypass | |
| Weaknesses | CWE-295 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-05-28T14:12:28.907Z
Reserved: 2026-05-07T21:50:33.546Z
Link: CVE-2026-44900
Updated: 2026-05-28T14:12:25.731Z
Status : Deferred
Published: 2026-05-26T22:16:42.873
Modified: 2026-05-27T19:41:21.417
Link: CVE-2026-44900
No data.
OpenCVE Enrichment
Updated: 2026-05-27T10:08:22Z