CVE-2026-27960

OpenCTI privilege escalation and unauthenticated access via default admin account

Published May 5, 2026 CVSS 3.1 · 9.8 Critical EPSS 7.1% KEV · Not listed
Description
OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. In versions 6.6.0 through 6.9.12, there is a privilege escalation vulnerability that can be exploited by unauthenticated attackers to query the API as any existing user, including the default admin account. This issue has been fixed in version 6.9.13. As a workaround, the default admin can be disabled using the `APP__ADMIN__EXTERNALLY_MANAGED` configuration.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Citeum
Citeum opencti
CPEs cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:*
Vendors & Products Citeum
Citeum opencti
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Opencti-platform
Opencti-platform opencti
Vendors & Products Opencti-platform
Opencti-platform opencti
Type Values Removed Values Added
Description OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. In versions 6.6.0 through 6.9.12, there is a privilege escalation vulnerability that can be exploited by unauthenticated attackers to query the API as any existing user, including the default admin account. This issue has been fixed in version 6.9.13. As a workaround, the default admin can be disabled using the `APP__ADMIN__EXTERNALLY_MANAGED` configuration.
Title OpenCTI privilege escalation and unauthenticated access via default admin account
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 6, 2026, 3:17 PM
Reserved
Feb 25, 2026, 3:24 AM
Status
Analyzed
Published
May 5, 2026, 7:16 PM
Modified
Jul 25, 2026, 11:10 AM