CVE-2026-27960

critical

Published 2026-05-05 · Modified 2026-05-20

CVSS v3

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2

—

VIR risk

9.8

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.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: security-advisories@github.com — https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-6vvv-vmfr-xhrx

Package impact

Ecosystem	Package	Vulnerable	Fixed
PyPI	pycti	`>=6.9.0,<6.9.13`	`6.9.13`

Application impact

Vendor	Product	Versions	Fixed
citeum	opencti	`{"startIncluding":"6.9.0","endExcluding":"6.9.13"}`	`6.9.13`

References

https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-6vvv-vmfr-xhrx

CWEs

CWE-287

Verify integrity in audit chain (admin only). AS-IS.