CVE-2026-72544 PUBLISHED

OpenSignLabs OpenSign - Insufficient Verification of Data Authenticity

Assigner: TuranSec
Reserved: 10.08.2026 Published: 11.08.2026 Updated: 11.08.2026

An integrity verification vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote attackers to forge document audit-trail entries via the triggerevent Parse cloud function. The function accepts viewer identity and IP address as caller-supplied parameters without authentication, allowing fabrication of arbitrary audit log entries. An attacker can tamper with the legal audit trail of any signed document, undermining non-repudiation.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS Score: 7.5

Product Status

Vendor OpenSignLabs
Product OpenSign
Versions
  • affected from 0 to 2.37.0 (incl.)

Credits

  • Bobur Abdugafforov (Mahadsec) finder

References

Problem Types

  • CWE-345: Insufficient Verification of Data Authenticity CWE