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.
References (2)
Core 2
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/oviva-ag/epa4all-client/security/advisories/GHSA-g8r3-5hwf-qp96
X_Refsource_Misc x_refsource_misc
https://github.com/oviva-ag/epa4all-client/pull/34
Scores
CVSS v3
8.1
EPSS
0.0012
EPSS Percentile
2.2%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-295
Status
published
Products (3)
com.oviva.telematik/epa4all-client
0 - 1.2.1Maven
com.oviva.telematik/epa4all-client
< 1.2.1
oviva-ag/epa4all-client
< 1.2.1
Published
May 26, 2026
Tracked Since
May 27, 2026