CVE-2026-72688
OpenSignLabs opensignserver - Missing Authentication for Critical Function
- State
- Published
- Severity
- 7.5 High
- Published
- Aug 10, 2026
- Updated
- Aug 10, 2026
- Reserved
- Aug 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | TuranSec |
Weaknesses
- CWE-306 Missing Authentication for Critical Function
Affected Products
| Product | Versions |
|---|---|
opensignserverOpenSignLabs |
|
References
- OpenSign GitHub Repositorythird-party-advisory
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