Unauthorized Access Vulnerability in OpenSignLabs OpenSignServer Product
CVE-2026-72692

7.5HIGH

Key Information:

Vendor

Opensignlabs

Status
Opensignserver
Vendor
CVE Published:
10 August 2026

What is CVE-2026-72692?

A missing authorization issue in OpenSignLabs OpenSignServer allows remote attackers without authentication to disrupt document workflows. Exploiting the 'declinedoc' Parse cloud function, attackers can decline any ongoing document transaction, falsely attributing the decline to any user by manipulating parameters like IsDeclined and DeclineBy. This poses a risk of unauthorized evidence alteration and potential misuse of document management systems.

Affected Version(s)

opensignserver 0 <= 2.37.0

References

https://github.com/OpenSignLabs/OpenSign
third-party-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Bobur Abdugafforov (Mahadsec)
.