{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-76820", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-19T19:52:28.214Z", "datePublished": "2026-09-15T19:40:39.727Z", "dateUpdated": "2026-09-15T19:40:39.727Z"}, "containers": {"cna": {"title": "OpenCTI: Synchronizer SSRF: stream fetch has no URL validation", "problemTypes": [{"descriptions": [{"cweId": "CWE-918", "lang": "en", "description": "CWE-918: Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-f6pj-3m32-q934", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-f6pj-3m32-q934"}, {"name": "https://github.com/OpenCTI-Platform/opencti/pull/16617", "tags": ["x_refsource_MISC"], "url": "https://github.com/OpenCTI-Platform/opencti/pull/16617"}, {"name": "https://github.com/OpenCTI-Platform/opencti/commit/6c1114ce8ce8f3a9d9b8c82dfff3a3a462e5dc1f", "tags": ["x_refsource_MISC"], "url": "https://github.com/OpenCTI-Platform/opencti/commit/6c1114ce8ce8f3a9d9b8c82dfff3a3a462e5dc1f"}, {"name": "https://github.com/OpenCTI-Platform/opencti/releases/tag/7.260701.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/OpenCTI-Platform/opencti/releases/tag/7.260701.0"}], "affected": [{"vendor": "OpenCTI-Platform", "product": "opencti", "versions": [{"version": "< 7.260701.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-15T19:40:39.727Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-f6pj-3m32-q934", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "opencti", "vendor": "OpenCTI-Platform", "versions": [{"status": "affected", "version": "< 7.260701.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-76820", "lastModified": "2026-09-15T20:17:57.127", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-15T20:17:57.127", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/OpenCTI-Platform/opencti/commit/6c1114ce8ce8f3a9d9b8c82dfff3a3a462e5dc1f"}, {"source": "security-advisories@github.com", "url": "https://github.com/OpenCTI-Platform/opencti/pull/16617"}, {"source": "security-advisories@github.com", "url": "https://github.com/OpenCTI-Platform/opencti/releases/tag/7.260701.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-f6pj-3m32-q934"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}