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ExploitedNot in CISA KEV yetFix available

CVE-2026-27960

Exploitation confirmed. First attested on 2026-09-21 by GCVE · previdian, GCVE · shadowserver.

  • Published2026-05-05
  • Fixed in6.9.13
  • WeaknessCWE-287

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-05-0519:16CVE publishedNVD
  2. 2026-09-2108:06Listed as exploited by GCVEGCVE
  3. 2026-09-2108:06Exploitation first reportedGCVE

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-27960?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-27960?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Citeum opencti
BranchAffectedFixed in
6.9≥ 6.9.0, < 6.9.136.9.13

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Citeum opencti to 6.9.13

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • GCVEexploitation2026-09-21
  • CISA-ADPSSVC decisionnone2026-05-06
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.19.8read 2026-10-23
  • CNAweakness (CWE)CWE-287read 2026-10-23
  • FIRST EPSSEPSS score4.7 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-05-05
Last Modified
2026-07-25
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-27960?

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.

Is CVE-2026-27960 actively exploited?

Active exploitation of CVE-2026-27960 has not been confirmed. Its EPSS score was 4.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-27960?

CVE-2026-27960 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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