{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-26963",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-02-16T22:20:28.612Z",
        "datePublished": "2026-02-19T23:38:36.110Z",
        "dateUpdated": "2026-02-20T15:36:37.658Z"
    },
    "containers": {
        "cna": {
            "title": "Cilium may not enforce host firewall policies when Native Routing, WireGuard and Node Encryption are enabled",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-863",
                            "lang": "en",
                            "description": "CWE-863: Incorrect Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "ADJACENT_NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 6.1,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "CHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3"
                },
                {
                    "name": "https://github.com/cilium/cilium/pull/42892",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/cilium/cilium/pull/42892"
                },
                {
                    "name": "https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885"
                },
                {
                    "name": "https://github.com/cilium/cilium/releases/tag/v1.18.6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/cilium/cilium/releases/tag/v1.18.6"
                }
            ],
            "affected": [
                {
                    "vendor": "cilium",
                    "product": "cilium",
                    "versions": [
                        {
                            "version": ">= 1.18.0, < 1.18.6",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-02-19T23:38:36.110Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.18.0 through 1.18.5 will incorrectly permit traffic from Pods on other nodes when Native Routing, WireGuard and Node Encryption are enabled. This issue has been fixed in version 1.18.6."
                }
            ],
            "source": {
                "advisory": "GHSA-5r23-prx4-mqg3",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-02-20T15:26:45.815584Z",
                                "id": "CVE-2026-26963",
                                "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": "2026-02-20T15:36:37.658Z"
                }
            }
        ]
    }
}