CVE-2026-44900HIGH 8.1EPSS p2.2%

CVE-2026-44900CVE-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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS0.12% probability of exploitation · percentile 2.2% · 2026-06-18T12:00:27Z
Published2026-05-26
Last modified2026-05-26

Underlying weaknesses· 1

CWE-295

References

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

1

TypeTargetConfidenceTier
WeaknessImproper Certificate Validationcwe-2950%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.