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 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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-rg6r-x26x-63vq	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:*

History

05 Jun 2026, 13:07

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.1
First Time		Citeum opencti Citeum
References	~~() https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-rg6r-x26x-63vq -~~	() https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-rg6r-x26x-63vq - Vendor Advisory
CPE		cpe:2.3:a:citeum:opencti::::::::

02 Jun 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-02 22:16

Updated : 2026-06-05 13:07

NVD link : CVE-2026-35212

Mitre link : CVE-2026-35212

CVE.ORG link : CVE-2026-35212

JSON object : View

Products Affected

citeum

opencti

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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