CVE-2026-44900

HIGH8.1EPSS 0.01%

epa4all-client has a VAU Signature bypass

發布日:2026/5/8修改日:2026/5/9

描述

### Impact 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. ### Patches Patched in [#34](https://github.com/oviva-ag/epa4all-client/pull/34). ### Workarounds None. ### Resources - [MS-OVIVA-EPA4ALL-d76aec](https://www.machinespirits.com/advisory/d76aec/) ### Credits [Machine Spirits](https://machinespirits.com) ([email protected]) - Dr. rer. nat. Simon Weber - Dipl.-Inf. Volker Schönefeld - Chiara Fliegner

受影響套件(1)

CVSS 分數

來源版本嚴重程度向量
osvCVSS 3.1HIGH8.1CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

參考連結(4)