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CVE-2026-27960criticalobserved exploitationCWE-287

OpenCTI privilege escalation and unauthenticated access via default admin account

65Vexday Risk Score

Patch now. It exploitation observed by VulnCheck and has a working public exploit.

ssvc Actcvss 9.8epss 1.8%
from disclosure to weapon
Published on NVDMay 5
VulnCheck+139d
exploitation probability
1.8%top 22% of all CVEs
observed exploitation
yesVulnCheck
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H