CVE-2026-27960 — Vulnerability in pycti — CVE Details

CRITICAL

Published May 5, 2026Updated May 20, 2026Source: osv

Summary

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.

Advisory Timeline

First published May 5, 2026 (160 days ago).
Last revised May 20, 2026 — 15 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip

Update pycti to 6.9.13 or later

pip install "pycti>=6.9.13"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: pypi (1).

Package	Ecosystem	Affected	Fixed In
pycti	pypi	6.9.0, 6.9.1, 6.9.10, 6.9.11 (+9 more)	6.9.13

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

References

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

Frequently Asked Questions

What is CVE-2026-27960?: This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2026-27960?: CVE-2026-27960 affects pycti. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-27960 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

PYSEC-2026-119

GHSA-6vvv-vmfr-xhrx

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