Vulnerabilities CVE-2026-72688

CVE-2026-72688

High

Open

TLP:CLEAR

OpenSignLabs opensignserver - Missing Authentication for Critical Function

NVD CVE.org

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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.

Details

CVSS Score: 7.5
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Confidence: 90%
Published: Aug 10, 2026
Last Modified: Aug 10, 2026

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