{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55245",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-16T16:44:00.624Z",
        "datePublished": "2026-08-28T18:24:16.723Z",
        "dateUpdated": "2026-08-28T19:54:10.966Z"
    },
    "containers": {
        "cna": {
            "title": "Bifrost: SSRF deny-list incomplete: isPublicIP permits CGNAT, IPv6 6to4/NAT64, and site-local in FetchAndEncodeURL",
            "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": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.7,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/maximhq/bifrost/security/advisories/GHSA-w98g-5w9p-p3rc",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/maximhq/bifrost/security/advisories/GHSA-w98g-5w9p-p3rc"
                },
                {
                    "name": "https://github.com/maximhq/bifrost/pull/4092",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/maximhq/bifrost/pull/4092"
                },
                {
                    "name": "https://github.com/maximhq/bifrost/commit/54ec431fc5255ff42c36420d88549477e0b33d89",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/maximhq/bifrost/commit/54ec431fc5255ff42c36420d88549477e0b33d89"
                },
                {
                    "name": "https://github.com/maximhq/bifrost/releases/tag/core/v1.5.17",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/maximhq/bifrost/releases/tag/core/v1.5.17"
                }
            ],
            "affected": [
                {
                    "vendor": "maximhq",
                    "product": "bifrost",
                    "versions": [
                        {
                            "version": "< 1.5.17",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-28T18:24:16.723Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Bifrost is an enterprise AI gateway for routing requests to model providers. Prior to 1.5.17, the isPublicIP function in core/providers/utils/fetch.go, reached through FetchAndEncodeURL for Bedrock and Vertex image or document URLs, classifies Carrier-Grade NAT 100.64.0.0/10, IPv6 6to4 2002::/16, NAT64 64:ff9b::/96 and 64:ff9b:1::/48, and deprecated IPv6 site-local fec0::/10 addresses as public. A remote attacker who controls a multimodal request URL can make the gateway fetch internal services, including a cloud instance metadata endpoint encoded through 6to4 or NAT64. This issue is fixed in version 1.5.17."
                }
            ],
            "source": {
                "advisory": "GHSA-w98g-5w9p-p3rc",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/maximhq/bifrost/security/advisories/GHSA-w98g-5w9p-p3rc",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-28T19:54:05.268770Z",
                                "id": "CVE-2026-55245",
                                "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": "2026-08-28T19:54:10.966Z"
                }
            }
        ]
    }
}