CVE-2026-35212

MEDIUM

OpenCTI has XSS in the rendering of email-message observable body data

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.1
EPSS 0.0015
EPSS Percentile 4.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (2)
citeum/opencti < 7.260227.0
OpenCTI-Platform/opencti < 7.260227.0
Published Jun 02, 2026
Tracked Since Jun 03, 2026