CVE-2026-27960

critical · 9.8

A public exploit / detection template exists

Weaponised detection is publicly available, which meaningfully raises real-world risk regardless of CVSS. nuclei-templates →

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.

9.8

CVSS

2.0%

EPSS (exploit prob.)

80th

EPSS percentile

2026-05-05

Published

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

Weaknesses

CWE-287

Affected products

Vendor	Product	Affected versions
citeum	opencti	>= 6.9.0, < 6.9.13

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-27960