CVE-2026-44900
epa4all-client has a VAU Signature bypass
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) (contact@machinespirits.de) - Dr. rer. nat. Simon Weber - Dipl.-Inf. Volker Schönefeld - Chiara Fliegner
如何修補 CVE-2026-44900
要修補 CVE-2026-44900,請將受影響套件升級到下列已修補版本。
- —升級至 1.2.1 或更新版本
CVE-2026-44900 正在被利用嗎?
低 — EPSS 為 0.1%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 1.2.1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |