{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-84318",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-01T16:17:43.079Z",
        "datePublished": "2026-10-12T20:20:18.595Z",
        "dateUpdated": "2026-10-12T20:20:18.595Z"
    },
    "containers": {
        "cna": {
            "title": "Nginx UI: MCP `nginx_config_add` Bypasses Directive Validation — Authenticated RCE",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-693",
                            "lang": "en",
                            "description": "CWE-693: Protection Mechanism Failure",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-9jww-cxg5-rj9m",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-9jww-cxg5-rj9m"
                },
                {
                    "name": "https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2"
                },
                {
                    "name": "https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1"
                }
            ],
            "affected": [
                {
                    "vendor": "0xJacky",
                    "product": "nginx-ui",
                    "versions": [
                        {
                            "version": ">= 2.0.0-rc.6, < 2.4.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-12T20:20:18.595Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Nginx UI is a web user interface for the Nginx web server. From 2.0.0-rc.6 until 2.4.1, the MCP tool nginx_config_add writes nginx configuration files to disk and triggers an nginx reload without calling config.ValidateConfigFile. The identical flow in the REST API (POST /api/configs) does call that function and correctly rejects dangerous directives. An authenticated attacker can exploit this gap to write config files containing any blocked directive (perl, js_import, load_module, user root, etc.), bypassing nginx-ui's entire security layer. On a server with the nginx Perl, njs, or Lua module loaded, this is post-authentication Remote Code Execution. This issue is fixed in version 2.4.1."
                }
            ],
            "source": {
                "advisory": "GHSA-9jww-cxg5-rj9m",
                "discovery": "UNKNOWN"
            }
        }
    }
}