High severity8.1GHSA Advisory· Published May 26, 2026· Updated May 27, 2026
CVE-2026-44900
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
com.oviva.telematik:epa4all-clientMaven | < 1.2.1 | 1.2.1 |
Affected products
2- Range: <= 1.2.0
Patches
Vulnerability mechanics
References
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