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.
References
History

Tue, 11 Aug 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Opensignlabs
Opensignlabs opensignserver
Vendors & Products Opensignlabs
Opensignlabs opensignserver

Mon, 10 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 10 Aug 2026 12:30:00 +0000

Type Values Removed Values Added
Description 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.
Title OpenSignLabs opensignserver - Missing Authentication for Critical Function
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: TuranSec

Published: 2026-08-10T11:59:02.770Z

Updated: 2026-08-10T18:22:30.882Z

Reserved: 2026-08-10T11:55:39.470Z

Link: CVE-2026-72688

cve-icon Vulnrichment

Updated: 2026-08-10T15:51:49.926Z

cve-icon NVD

Status : Received

Published: 2026-08-10T13:20:38.987

Modified: 2026-08-10T19:17:33.003

Link: CVE-2026-72688

cve-icon Redhat

No data.