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CVE-2026-50578— ePA 3.x Integration: TLS Certificate Verification Universally Disabled

Quick assessment

Affected
fbeta-GmbH ePA3-Service-OpenSource
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

fbeta ePA 3.x Integration是德国fbeta公司的一款Web服务集成组件。 fbeta ePA 3.x Integration 1.3.0之前版本存在加密问题漏洞，该漏洞源于ePA连接（app/vau/VAUProtokoll.py）和Konnektor连接（app/konnektor/Konnektor.py）的TLS证书验证被禁用，且VAU协议应用层证书验证失效，可能导致网络攻击者呈现任意证书、终止TLS连接并拦截ePA流量，或冒充Konnektor接收客户端TLS证书交换并观察

CVSS 7.5 · High EPSS 0.18% · P8

Affected Version Matrix 1

VendorProduct Version RangeStatus
fbeta-GmbH ePA3-Service-OpenSource < 1.3.0 affected
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I. Basic Information for CVE-2026-50578

Vulnerability Information
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Vulnerability Title
ePA 3.x Integration: TLS Certificate Verification Universally Disabled
Source: CVE Program / CVE List V5
Vulnerability Description
ePA 3.x Integration implements the authorization workflow and writes Medical Information Objects to Germany's electronic patient record. Prior to 1.3.0, ePA 3.x Integration disables TLS certificate verification for both ePA connections in app/vau/VAUProtokoll.py and Konnektor connections in app/konnektor/Konnektor.py. A network-positioned attacker can present an arbitrary certificate, terminate the TLS connection, and intercept ePA traffic. The VAU protocol does not provide an effective fallback because its application-layer certificate validation is also broken in affected versions. The Konnektor session uses self.session.verify set to False while the client authenticates with self.session.cert, so an attacker impersonating the Konnektor can receive the client's mutual TLS certificate exchange and observe smartcard operations. This issue is fixed in version 1.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
fbeta ePA 3.x Integration 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fbeta ePA 3.x Integration是德国fbeta公司的一款Web服务集成组件。 fbeta ePA 3.x Integration 1.3.0之前版本存在加密问题漏洞，该漏洞源于ePA连接（app/vau/VAUProtokoll.py）和Konnektor连接（app/konnektor/Konnektor.py）的TLS证书验证被禁用，且VAU协议应用层证书验证失效，可能导致网络攻击者呈现任意证书、终止TLS连接并拦截ePA流量，或冒充Konnektor接收客户端TLS证书交换并观察
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
fbeta-GmbH ePA3-Service-OpenSource < 1.3.0 -

II. Public POCs for CVE-2026-50578

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8364 chars
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III. Intelligence Information for CVE-2026-50578

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Patches & Fixes for CVE-2026-50578 (2)

Vendor Advisories for CVE-2026-50578 (2)

Other References for CVE-2026-50578 (1)

Same Patch Batch · fbeta-GmbH · 2026-08-18 · 4 CVEs total

CVE-2026-52723 9.1 CRITICAL ePA 3.x Integration: VAU Server Authentication Bypass via Circular Certificate Trust
CVE-2026-50577 7.4 HIGH ePA 3.x Integration: AES-GCM Nonce Reuse via Frozen VAU Request Counter
CVE-2026-50576 6.8 MEDIUM ePA 3.x Integration: HTTP Header Injection in VAU Inner Requests

IV. Related Vulnerabilities

Same product: ePA3-Service-OpenSource
Same vendor: fbeta-GmbH
Same weakness: CWE-295

V. Comments for CVE-2026-50578

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