What’s Vulnerable › Vulnerabilities
CVE-2026-35212: OpenCTI has XSS in the rendering of email-message observable body data
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-02 · updated 2026-07-22
- Weakness: CWE-79
Description
OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Versions prior to 7.260227.0 are vulnerable to XSS in the rendering of email-message observable body data. The content of the body field isn't appropriately sanitized when being rendered. Does require user interaction but could be exploited by someone sharing stix or any of the ingester. This could lead to CSRF and then large scale session theft. Version 7.260227.0 contains a fix.
Affected products
- OpenCTI-Platform opencti: before 7.260227.0 — fixed in 7.260227.0
How to fix
Upgrade to a fixed version: OpenCTI-Platform opencti 7.260227.0. Check the vendor advisory for mitigations.
References
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