cvedb.io
CVE-2026-21887
HIGH · CVSS 7.7
EPSS exploitation probability: 0%
Published 2026-03-12T17:16:36.813 · Last modified 2026-06-17T10:19:05.640

Summary

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 6.8.16, the OpenCTI platform’s data ingestion feature accepts user-supplied URLs without validation and uses the Axios HTTP client with its default configuration (allowAbsoluteUrls: true). This allows attackers to craft requests to arbitrary endpoints, including internal services, because Axios will accept and process absolute URLs. This results in a semi-blind SSRF, as responses may not be fully visible but can still impact internal systems. This vulnerability is fixed in 6.8.16.

Affected products

citeum — opencti

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.