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Vulnerability Detail

CVE-2026-76820 Verified Sceawere Triage Sources: NVD / CISA KEV

Vulnerability Metadata

Severity
High
Score / CVSS
7.7
Creation Date
3h ago
Vendor
OpenCTI-Platform
Product
opencti
Attack Type
CWE-918: Server-Side Request Forgery (SSRF)
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack Complexity
LOW

Narrative and Response

Description

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 7.260701.0, the synchronizerFetch GraphQL query called fetchRemoteStreams after checking only that a remote stream URL used HTTP or HTTPS. The backend did not apply the ingestion deny list or reject private, loopback, and link-local destinations, allowing an authenticated account with the INGESTION capability to make OpenCTI request internal services and cloud metadata endpoints. Returned connection errors could distinguish open HTTP ports, open non-HTTP ports, and closed ports, enabling internal network scanning, while compatible endpoint responses could disclose internal data. This issue is fixed in version 7.260701.0.

Executive Summary

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Technical Details

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Mitigations

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References

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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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Additional Metadata

{
  "score": "7.7",
  "pubDate": "2026-09-15T20:17:57.127Z",
  "pubdate": "2026-09-15T20:17:57.127Z"
}
CVE-2026-76820: CVE-2026-76820 Vulnerability (HIGH Severity, CVSS: 7.7) | Sceawere