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CVE-2026-27960— OpenCTI privilege escalation and unauthenticated access via default admin account

Quick assessment

Affected
OpenCTI-Platform opencti
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenCTI是OpenCTI开源的一个开放网络威胁情报平台。 OpenCTI 6.6.0版本至6.9.12版本存在授权问题漏洞。攻击者利用该漏洞可以以任何现有用户（包括默认管理员帐户）的身份查询 API。

CVSS 9.8 · Critical EPSS 1.80% · P78

Public Exploits 1

Nuclei · 1 CVE-2026-27960.yaml [template]

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenCTI-Platform opencti >= 6.6.0, < 6.9.13 affected
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I. Basic Information for CVE-2026-27960

Vulnerability Information
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Vulnerability Title
OpenCTI privilege escalation and unauthenticated access via default admin account
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
OpenCTI 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenCTI是OpenCTI开源的一个开放网络威胁情报平台。 OpenCTI 6.6.0版本至6.9.12版本存在授权问题漏洞。攻击者利用该漏洞可以以任何现有用户（包括默认管理员帐户）的身份查询 API。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenCTI-Platform opencti >= 6.6.0, < 6.9.13 -

II. Public POCs for CVE-2026-27960

# POC Description Source Link Shenlong Link
1 OpenCTI < 6.9.13 allows authentication bypass by supplying a Bearer token set to the admin user's internal_id UUID instead of a valid JWT. The default admin internal_id (88ec0c6a-13ce-5e39-b486-354fe4a7084f) grants full admin access to the GraphQL API, effectively bypassing all authentication. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-27960.yaml POC Details
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III. Intelligence Information for CVE-2026-27960

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Vendor Advisories for CVE-2026-27960 (1)

IV. Related Vulnerabilities

Same product: opencti
Same vendor: OpenCTI-Platform
Same weakness: CWE-287

V. Comments for CVE-2026-27960

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