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Vulnerabilities CVE-2026-72691

CVE-2026-72691

High
Open
TLP:CLEAR

OpenSignLabs opensignserver - Authentication Bypass

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Description

An authentication bypass vulnerability in OpenSignLabs opensignserver through 2.37.0 allows an unauthenticated remote attacker to mint MASTER_KEY-signed file access tokens for arbitrary stored files via the getsignedurl Parse cloud function. The function skips its isAuthenticated check whenever any docId parameter is supplied, even one corresponding to no real document, allowing the authentication gate to be bypassed by supplying an arbitrary string as docId.

Details

CVSS Score
7.5
EPSS Score
0.39%

32.3th percentile

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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