CVE-2026-27960CWE-287

OpenCTI privilege escalation and unauthenticated access via default admin account

Critical · published May 5, 2026

CVSS v3.1
9.8
EPSS
5%
Percentile
91.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.04680 · 91.7th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-05-05T18:35Z
EPSS history
Timeline
  • 05 MAY 18:35Z
    OpenCTI privilege escalation and unauthenticated access via default admin account
    cvelistv5