CVE-2026-72688

A missing authentication vulnerability in OpenSignLabs opensignserver through 2.37.0 allows an unauthenticated remote attacker to read arbitrary stored documents via the fileupload Parse cloud function. The function mints MASTER_KEY-signed file access tokens for any caller-supplied URL without performing any session check, defeating the only access control protecting stored contract files.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/OpenSignLabs/OpenSign

Configurations

No configuration.

History

23 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad de autenticación faltante en OpenSignLabs opensignserver hasta la versión 2.37.0 permite a un atacante remoto no autenticado leer documentos almacenados arbitrarios a través de la función en la nube fileupload Parse. La función emite tokens de acceso a archivos firmados con MASTER_KEY para cualquier URL proporcionada por el llamador sin realizar ninguna verificación de sesión, eludiendo el único control de acceso que protege los archivos de contrato almacenados.

Information

Published : 2026-08-10 13:20

Updated : 2026-10-24 15:10

NVD link : CVE-2026-72688

Mitre link : CVE-2026-72688

CVE.ORG link : CVE-2026-72688

JSON object : View

Products Affected

No product.

CWE

CWE-306

Missing Authentication for Critical Function

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