{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-56742",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-22T19:17:28.959Z",
        "datePublished": "2026-07-15T19:14:07.617Z",
        "dateUpdated": "2026-07-16T12:57:08.040Z"
    },
    "containers": {
        "cna": {
            "title": "Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-862",
                            "lang": "en",
                            "description": "CWE-862: Missing Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "ADJACENT_NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 5.9,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "HIGH",
                        "scope": "CHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmj",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmj"
                },
                {
                    "name": "https://github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333deb",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333deb"
                },
                {
                    "name": "https://github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857"
                },
                {
                    "name": "https://github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032b"
                },
                {
                    "name": "https://github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512ca",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512ca"
                },
                {
                    "name": "https://github.com/cilium/cilium/releases/tag/v1.17.17",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/cilium/cilium/releases/tag/v1.17.17"
                },
                {
                    "name": "https://github.com/cilium/cilium/releases/tag/v1.18.11",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/cilium/cilium/releases/tag/v1.18.11"
                },
                {
                    "name": "https://github.com/cilium/cilium/releases/tag/v1.19.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/cilium/cilium/releases/tag/v1.19.5"
                }
            ],
            "affected": [
                {
                    "vendor": "cilium",
                    "product": "cilium",
                    "versions": [
                        {
                            "version": "< 1.17.17",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.18.0, < 1.18.11",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.19.0, < 1.19.5",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-15T19:14:07.617Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Cilium is a networking, observability, and security solution. Prior to 1.17.17, 1.18.11, and 1.19.5, Cilium clusters using Gateway API allow users with permissions to create or update namespaced HTTPRoutes to mirror HTTP traffic to any Service in any namespace, bypassing the ReferenceGrant authorization mechanism. Gateway API functionality is disabled by default. This issue is fixed in versions 1.17.17, 1.18.11, and 1.19.5."
                }
            ],
            "source": {
                "advisory": "GHSA-w7c2-w76w-5hmj",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-16T12:56:22.128191Z",
                                "id": "CVE-2026-56742",
                                "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": "2026-07-16T12:57:08.040Z"
                }
            }
        ]
    }
}