{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-101025",
        "assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
        "state": "PUBLISHED",
        "assignerShortName": "f5",
        "dateReserved": "2026-09-30T21:56:14.628Z",
        "datePublished": "2026-10-14T14:40:29.324Z",
        "dateUpdated": "2026-10-15T16:43:46.495Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unknown",
                    "modules": [
                        "ngx_http_js_module"
                    ],
                    "product": "NGINX JavaScript",
                    "vendor": "F5",
                    "versions": [
                        {
                            "lessThan": "1.0.2",
                            "status": "affected",
                            "version": "0.7.10",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "F5"
                }
            ],
            "datePublic": "2023-01-01T00:00:00.000Z",
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<span style=\"background-color: rgb(255, 255, 255);\">Description<br></span>\n\nNGINX JavaScript (njs) has a vulnerability where the built-in njs engine leaks a libxml2 parser context when xml.parse() fails. The failure path did not register cleanup and the context was not released for the lifetime of the process. An unauthenticated attacker may send requests with malformed XML and can cause unbounded memory growth in long-lived NGINX worker processes.<br><br>Impact<br>\n\nThis vulnerability may allow remote attackers to send requests that trigger repeated parsing of malformed XML and may lead to NGINX worker termination or denial of service.&nbsp;There is no control plane exposure; this is a data plane issue only.\n\n<br><br>&nbsp;Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
                        }
                    ],
                    "value": "Description\n\n\nNGINX JavaScript (njs) has a vulnerability where the built-in njs engine leaks a libxml2 parser context when xml.parse() fails. The failure path did not register cleanup and the context was not released for the lifetime of the process. An unauthenticated attacker may send requests with malformed XML and can cause unbounded memory growth in long-lived NGINX worker processes.\n\nImpact\n\n\nThis vulnerability may allow remote attackers to send requests that trigger repeated parsing of malformed XML and may lead to NGINX worker termination or denial of service. There is no control plane exposure; this is a data plane issue only.\n\n\n\n Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-131",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-131 Resource Leak Exposure"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                        "version": "3.1"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                },
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 6.9,
                        "baseSeverity": "MEDIUM",
                        "privilegesRequired": "NONE",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "NONE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "LOW",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-401",
                            "description": "CWE-401 Missing Release of Memory after Effective Lifetime",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
                "shortName": "f5",
                "dateUpdated": "2026-10-14T14:40:29.324Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://my.f5.com/manage/s/article/K000162614"
                }
            ],
            "source": {
                "discovery": "INTERNAL"
            },
            "title": "NGINX ngx_http_js_module vulnerability",
            "workarounds": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "Use the QuickJS engine with js_engine qjs;, which is not affected. Where migration is not possible, avoid passing attacker-controlled XML to xml.parse(), reject or rate-limit malformed input, and use worker memory limits."
                        }
                    ],
                    "value": "Use the QuickJS engine with js_engine qjs;, which is not affected. Where migration is not possible, avoid passing attacker-controlled XML to xml.parse(), reject or rate-limit malformed input, and use worker memory limits."
                }
            ],
            "x_generator": {
                "engine": "F5 SIRTBot v1.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-101025",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-10-15T15:54:08.402411Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-15T16:43:46.495Z"
                }
            }
        ]
    }
}