{
    "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": "2026-09-16T19:23:48.304Z"
    },
    "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"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-16T19:21:38.656123Z",
                                "id": "CVE-2026-76820",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-16T19:23:48.304Z"
                }
            }
        ]
    }
}