by Kastro
Paper/Archive/CVE-2026-27960

CVE-2026-27960

OpenCTI-Platform opencti — OpenCTI privilege escalation and unauthenticated access via default admin account

EPSS 7%CVSS 9.8
critical.is priorityof 100
48
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 94.2.942 × 2018.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
opencti>= 6.6.0, < 6.9.13–CNA

Scores by source

GitHub_M (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/OpenCTI-Platform/opencti/security/advisories/GHSA-6vvv-vmfr-xhrx