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CVE-2026-50576— ePA 3.x Integration: HTTP Header Injection in VAU Inner Requests

Quick assessment

Affected
fbeta-GmbH ePA3-Service-OpenSource
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 Integration1.3.0之前版本存在输入验证错误漏洞，该漏洞源于未中和CRLF字符，可能导致经过身份验证的攻击者注入额外标头，暴露其他患者记录或绕过身份验证和授权。

CVSS 6.8 · Medium EPSS 0.49% · P40

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-2026-50576

Vulnerability Information
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Vulnerability Title
ePA 3.x Integration: HTTP Header Injection in VAU Inner Requests
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 does not neutralize CRLF characters in values used by app/vau/VAUProtokoll.py to construct VAU inner HTTP requests. The build_inner_header function interpolates the uri, host, accept_type, content_type, content_length, USER_AGENT, and insurant_id values into request lines and headers, including x-useragent and x-insurantid. An authenticated attacker who controls a value can inject additional headers into the inner request. Depending on ePA server handling, an injected x-insurantid header can expose another patient's records, and injected Authorization headers can bypass the intended authentication or authorization context. Session-derived USER_AGENT input can also poison requests across the session. This issue is fixed in version 1.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP头部中CRLF序列转义处理不恰当(HTTP响应分割)
Source: CVE Program / CVE List V5
Vulnerability Title
fbeta ePA 3.x Integration 输入验证错误漏洞
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 Integration1.3.0之前版本存在输入验证错误漏洞，该漏洞源于未中和CRLF字符，可能导致经过身份验证的攻击者注入额外标头，暴露其他患者记录或绕过身份验证和授权。
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-2026-50576

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III. Intelligence Information for CVE-2026-50576

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Patches & Fixes for CVE-2026-50576 (2)

Vendor Advisories for CVE-2026-50576 (1)

Other References for CVE-2026-50576 (2)

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-2026-50578 7.5 HIGH ePA 3.x Integration: TLS Certificate Verification Universally Disabled
CVE-2026-50577 7.4 HIGH ePA 3.x Integration: AES-GCM Nonce Reuse via Frozen VAU Request Counter

IV. Related Vulnerabilities

Same product: ePA3-Service-OpenSource
Same vendor: fbeta-GmbH
Same weakness: CWE-113

V. Comments for CVE-2026-50576

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