Medium
OpenCTI has XSS in the rendering of email-message observable body data
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-35212
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 01:30 UTC · Revision 1
Source evidence
OpenCTI has XSS in the rendering of email-message observable body data
core-osv · Original sourcePublished 2 Jun 2026, 21:28 UTC
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.
osv:CVE-2026-35212
Complete source record
{
"id": "b0d39f7455f6e285db1856b35985fe525b0f0462afc026ebaab38afbb8c28e4d",
"url": "https://osv.dev/vulnerability/CVE-2026-35212",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "OpenCTI has XSS in the rendering of email-message observable body data",
"summary": "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.",
"evidence": "osv:CVE-2026-35212",
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"aliases": [
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"GHSA-rg6r-x26x-63vq",
"PYSEC-2026-203"
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"modified": "2026-10-28T02:30:48.685351319Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35212.json",
"https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-rg6r-x26x-63vq",
"https://nvd.nist.gov/vuln/detail/CVE-2026-35212"
],
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"source_id": "core-osv",
"document_id": 516995,
"published_at": "2026-06-02T21:28:59.375+00:00"
}