cvedb.io
CVE-2025-26621
HIGH · CVSS 7.6
EPSS exploitation probability: 0%
Published 2025-05-19T16:15:28.560 · Last modified 2026-06-17T09:02:08.763

Summary

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.5.2, any user with the capability manage customizations can edit webhook that will execute javascript code. This can be abused to cause a denial of service attack by prototype pollution, making the node js server running the OpenCTI frontend become unavailable. Version 6.5.2 fixes the issue.

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.