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OpenCTI: Privilege escalation via graphQL API is abusable by organization admins, due to incorrect ACL on userEdit relationAdd

High severity GitHub Reviewed Published May 5, 2026 in OpenCTI-Platform/opencti • Updated May 28, 2026

Package

pip pycti (pip)

Affected versions

>= 0, < 6.9.7

Patched versions

6.9.7

Description

Summary

An organization admin can escalate their privileges by adding a user from a different organization with higher privileges, to their own organization.

Impact

Full platform access, access to sensitive or proprietary information.

References

@aHenryJard aHenryJard published to OpenCTI-Platform/opencti May 5, 2026
Published by the National Vulnerability Database May 26, 2026
Published to the GitHub Advisory Database May 28, 2026
Reviewed May 28, 2026
Last updated May 28, 2026

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(24th percentile)

Weaknesses

Improper Access Control

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Learn more on MITRE.

CVE ID

CVE-2026-44730

GHSA ID

GHSA-q537-qhj4-wcjx

Source code

Credits

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