CVE-2026-72533

An authentication bypass vulnerability in Portainer CE through 2.44.0 allows authenticated low-privileged users to bypass Docker proxy authorization checks via non-canonical URL normalization, defeating all authorization middleware. The proxy endpoint fails to normalize request paths before applying access controls, allowing crafted requests to be interpreted differently by the proxy and the authorization layer. Successful exploitation grants the attacker root-level access to the underlying Docker host.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/portainer/portainer

Configurations

No configuration.

History

23 Oct 2026, 19:10

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad de omisión de autenticación en Portainer CE hasta la versión 2.44.0 permite a usuarios autenticados con pocos privilegios omitir las comprobaciones de autorización del proxy de Docker mediante normalización de URL no canónica, eludiendo todo el middleware de autorización. El punto final del proxy no normaliza las rutas de solicitud antes de aplicar los controles de acceso, permitiendo que las solicitudes manipuladas sean interpretadas de manera diferente por el proxy y la capa de autorización. La explotación exitosa otorga al atacante acceso a nivel de root al host de Docker subyacente.

Information

Published : 2026-08-11 12:17

Updated : 2026-10-24 15:10

NVD link : CVE-2026-72533

Mitre link : CVE-2026-72533

CVE.ORG link : CVE-2026-72533

JSON object : View

Products Affected

No product.

CWE

CWE-287

Improper Authentication

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