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TI-2026-50802 Aliases CVE-2026-72543GHSA-89m8-qpv9-7q8g

OpenSignLabs OpenSign - Insecure Direct Object Reference

Priority MEDIUM 40CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

An insecure direct object reference vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote attackers to retrieve any contact record via the getcontact Parse cloud function. The function executes with useMasterKey and performs no authentication or authorization checks before returning the requested contact object. An attacker can enumerate and read all contact records including personally identifiable information without credentials.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0061 49th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenSignLabsOpenSignup to 2.37.0—No fix listedCNA
  • OpenSign VendorOpenSignLabs Affected up to 2.37.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-72543
  2. 2026-10-03 Alias added: GHSA-89m8-qpv9-7q8g

References

Other 1

  • TI-2026-62535 OpenSign through 2.41.3 Information Disclosure via getDocument CVSS 4.0HIGH 8.7
  • TI-2026-50929 OpenSignLabs opensignserver - Authentication Bypass CVSS 3.1HIGH 7.5
  • TI-2026-50926 OpenSignLabs opensignserver - Missing Authentication for Critical Function CVSS 3.1HIGH 7.5
  • TI-2026-50807 OpenSignLabs OpenSign - Information Disclosure CVSS 3.1HIGH 7.5
  • TI-2026-50804 OpenSignLabs OpenSign - Insecure Direct Object Reference CVSS 3.1HIGH 7.5
  • TI-2026-50930 OpenSignLabs opensignserver - Missing Authorization CVSS 3.1HIGH 7.5
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences