CVE-2026-35212: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in OpenCTI-Platform opencti
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.
CVE-2026-35212: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in OpenCTI-Platform opencti
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.
CVSS v4.0
Score 5.3medium
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-01T18:48:58.937Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1f4fb5e29bf47b5009becc
Added to database: 6/2/2026, 9:48:37 PM
Last updated: 6/2/2026, 9:48:39 PM
Views: 1
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