{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55787",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-17T14:40:28.380Z",
        "datePublished": "2026-10-14T18:13:52.454Z",
        "dateUpdated": "2026-10-15T14:55:23.673Z"
    },
    "containers": {
        "cna": {
            "title": "Flyto2 Core: SSRF guard bypass via IPv6 transition addresses (IPv4-mapped / 6to4 / NAT64) in validate_url_ssrf",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-918",
                            "lang": "en",
                            "description": "CWE-918: Server-Side Request Forgery (SSRF)",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "LOW",
                        "scope": "CHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/flytohub/flyto-core/security/advisories/GHSA-794r-5rp2-fpg8",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/flytohub/flyto-core/security/advisories/GHSA-794r-5rp2-fpg8"
                },
                {
                    "name": "https://github.com/flytohub/flyto-core/pull/20",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/flytohub/flyto-core/pull/20"
                },
                {
                    "name": "https://github.com/flytohub/flyto-core/commit/519e040384a74984848c4e84a6600e5f1020a6d2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/flytohub/flyto-core/commit/519e040384a74984848c4e84a6600e5f1020a6d2"
                },
                {
                    "name": "https://github.com/flytohub/flyto-core/releases/tag/v2.26.3",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/flytohub/flyto-core/releases/tag/v2.26.3"
                }
            ],
            "affected": [
                {
                    "vendor": "flytohub",
                    "product": "flyto-core",
                    "versions": [
                        {
                            "version": "< 2.26.3",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-14T18:13:52.454Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.3, validate_url_ssrf and is_private_ip in src/core/utils.py compare resolved addresses only against native private IPv4 and IPv6 ranges and do not unwrap IPv4-mapped, IPv4-compatible, 6to4, or NAT64 transition addresses. An authenticated workflow author can provide a transition-form literal URL through the Execution API POST /v1/execute route, http.get, or sibling guarded outbound-request modules, causing the guard to accept an address whose embedded IPv4 points to loopback, RFC 1918, or cloud metadata services. On a host that routes the selected transition form, the outbound request reaches the internal destination and returns the response body to the workflow caller, enabling read SSRF and disclosure of internal-service data or cloud credentials. This issue is fixed in version 2.26.3."
                }
            ],
            "source": {
                "advisory": "GHSA-794r-5rp2-fpg8",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/flytohub/flyto-core/security/advisories/GHSA-794r-5rp2-fpg8",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-15T14:54:19.186468Z",
                                "id": "CVE-2026-55787",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "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": "2026-10-15T14:55:23.673Z"
                }
            }
        ]
    }
}