Vulnerability Description
OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 7.260401.0, the OpenCTI GraphQL API exposes a script filter operator in its FilterOperator enum that allows any authenticated user with the KNOWLEDGE capability to pass user-supplied Elasticsearch Painless script values directly into search queries without validation or sanitization, allowing computationally expensive scripts to consume cluster CPU resources and degrade or deny service for all users. This issue is fixed in version 7.260401.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Citeum | Opencti | < 7.260401.0 |
Related Weaknesses (CWE)
References
- https://github.com/OpenCTI-Platform/opencti/commit/b134ccedf9e68386723cb42197f8ePatch
- https://github.com/OpenCTI-Platform/opencti/pull/15284Issue TrackingPatch
- https://github.com/OpenCTI-Platform/opencti/releases/tag/7.260401.0Release Notes
- https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-qpp6-p693-rVendor Advisory
FAQ
What is CVE-2026-35211?
CVE-2026-35211 is a vulnerability with a CVSS score of 6.5 (MEDIUM). OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 7.260401.0, the OpenCTI GraphQL API exposes a script filter operator in its FilterOperator...
How severe is CVE-2026-35211?
CVE-2026-35211 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-35211?
Check the references section above for vendor advisories and patch information. Affected products include: Citeum Opencti.