What is CVE-2026-35212?

CVE-2026-35212 is a medium-severity vulnerability in Citeum Opencti, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-06-02.

How severe is CVE-2026-35212?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Citeum Opencti

CVE-2026-35212

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 i…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (15.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Citeum Opencti
Opencti-platform Opencti — versions < 7.260227.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-35212?: CVE-2026-35212 is a medium-severity vulnerability in Citeum Opencti, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-06-02.
How severe is CVE-2026-35212?: Medium severity. CVSS v3 base score is 6.1 out of 10.