CVE-2026-50576
ePA 3.x Integration: HTTP Header Injection in VAU Inner Requests
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.
INFO
Published Date :
Aug. 18, 2026, 5:16 p.m.
Last Modified :
Oct. 22, 2026, 10:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update ePA 3.x Integration to version 1.3.0.
- Ensure CRLF characters are neutralized in input values.
- Validate user inputs for header injection vulnerabilities.
- Apply security patches promptly.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-50576.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-50576 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-50576
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-50576 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-50576 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 22, 2026
Action Type Old Value New Value Added Translation Title: ePA3-Service-OpenSource de fbeta-GmbH, Description: La Integración de ePA 3.x implementa el flujo de trabajo de autorización y escribe Objetos de Información Médica en el historial electrónico del paciente de Alemania. Antes de la versión 1.3.0, la Integración de ePA 3.x no neutraliza los caracteres CRLF en los valores utilizados por app/vau/VAUProtokoll.py para construir solicitudes HTTP internas de VAU. La función build_inner_header interpola los valores uri, host, accept_type, content_type, content_length, USER_AGENT e insurant_id en líneas de solicitud y encabezados, incluyendo x-useragent y x-insurantid. Un atacante autenticado que controla un valor puede inyectar encabezados adicionales en la solicitud interna. Dependiendo del manejo del servidor de ePA, un encabezado x-insurantid inyectado puede exponer los registros de otro paciente, y los encabezados Authorization inyectados pueden eludir el contexto de autenticación o autorización previsto. La entrada USER_AGENT derivada de la sesión también puede envenenar solicitudes a través de la sesión. Este problema está solucionado en la versión 1.3.0. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 18, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-50576', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-18T19:07:38.144792Z'} -
New CVE Received by [email protected]
Aug. 18, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'fbeta-GmbH', 'product': 'ePA3-Service-OpenSource', 'versions': [{'status': 'affected', 'version': '< 1.3.0'}]}] Added 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. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-113 Added Reference https://github.com/fbeta-GmbH/ePA3-Service-OpenSource/commit/b984d15d261423302de337adae25e84c54e9c2d1 Added Reference https://github.com/fbeta-GmbH/ePA3-Service-OpenSource/pull/11 Added Reference https://github.com/fbeta-GmbH/ePA3-Service-OpenSource/releases/tag/1.3.0 Added Reference https://github.com/fbeta-GmbH/ePA3-Service-OpenSource/security/advisories/GHSA-j8jg-7fqf-4xx9 Added Reference https://www.machinespirits.de/advisory/013a60