{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-76898",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-19T22:43:14.890Z",
        "datePublished": "2026-09-21T16:31:54.813Z",
        "dateUpdated": "2026-09-24T22:21:52.041Z"
    },
    "containers": {
        "cna": {
            "title": "draw.io: Unauthenticated SSRF via IPv6 ULA blocklist bypass in /embed2.js",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-918",
                            "lang": "en",
                            "description": "CWE-918: Server-Side Request Forgery (SSRF)",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 7.7,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/jgraph/drawio/security/advisories/GHSA-m3q9-cwfq-hcjc",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/jgraph/drawio/security/advisories/GHSA-m3q9-cwfq-hcjc"
                },
                {
                    "name": "https://github.com/jgraph/drawio/commit/73c4a91196246bbdb60f52b15871e82006b7972d",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/jgraph/drawio/commit/73c4a91196246bbdb60f52b15871e82006b7972d"
                },
                {
                    "name": "https://github.com/jgraph/drawio/releases/tag/v30.3.8",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/jgraph/drawio/releases/tag/v30.3.8"
                }
            ],
            "affected": [
                {
                    "vendor": "jgraph",
                    "product": "drawio",
                    "versions": [
                        {
                            "version": "< 30.3.8",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-21T16:31:54.813Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.3.8, src/main/java/com/mxgraph/online/Utils.java checks IPv6 Unique Local Addresses in Utils.sanitizeUrl() by comparing the text prefixes fc00:: and fd00::, but the JDK returns the expanded address form, so the fc00::/7 range, including the AWS metadata range fd00:ec2::/32, is not blocked. An unauthenticated request to /embed2.js?fetch= can therefore make src/main/java/com/mxgraph/online/EmbedServlet2.java fetch an IPv6 ULA internal resource and reflect the response to the requester. Utils.validatedAddress() uses the same private-address check for the separate ProxyServlet path, which requires ENABLE_DRAWIO_PROXY=1. The primary /embed2.js path requires no proxy feature flag or DNS rebinding, and it can disclose cloud metadata credentials or data from other IPv6-reachable internal services. This issue is fixed in version 30.3.8."
                }
            ],
            "source": {
                "advisory": "GHSA-m3q9-cwfq-hcjc",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/jgraph/drawio/security/advisories/GHSA-m3q9-cwfq-hcjc",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-24T22:21:23.483091Z",
                                "id": "CVE-2026-76898",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "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": "2026-09-24T22:21:52.041Z"
                }
            }
        ]
    }
}