CVE-2026-44900

HIGH EPSS 2.2%

Published May 26, 20261mo ago · Modified Jun 17, 20262w ago

8.1 CVSS 3.1

High

Published May 26, 2026 1mo ago

Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score

8.1

Exploitability

2.8

Impact

5.2

Vector string

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector Adjacent

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality High

Integrity High

Availability None

Threat Intelligence

EPSS Exploit Probability

2.2% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-295

References 2

github.com https://github.com/oviva-ag/epa4all-client/pull/34
github.com https://github.com/oviva-ag/epa4all-client/security/advisories/GHSA-g8r3-5hwf-qp96

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.