{"id":"CVE-2026-101019","revision":"51d7855037cc470b810eb160039772bc","records":[{"revision":"51d7855037cc470b810eb160039772bc","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-101019","aliases":[],"title":"NGINX ngx_http_js_module vulnerability","description":"Description\nNGINX JavaScript (njs) has a vulnerability where the njs XML module exposes entity-backed XML attributes inconsistently with libxml2 canonicalization. In both the built-in njs and QuickJS backends during the canonicalization process, the $attr$Name getter may return undefined for an explicitly present attribute containing an internal entity reference. The $attrs getter may return a value derived only from the first attribute child. This may allow an unauthenticated attacker that invests significant effort in obtaining a genuinely signed document to skip validation while signature verification succeeds. An nginx-saml deployment is a confirmed affected consumer when run with the built-in njs backend.\n\nImpact\nIn affected signed-XML consumers, an unauthenticated attacker can cause security-relevant attributes to appear absent or truncated while signature verification succeeds. In nginx-saml, this can bypass expiry, Destination, and request-correlation checks, enabling replay or acceptance of a response outside its intended context. It does not permit signature or identity forgery, or a direct availability impact.\u00A0There is no control plane exposure; this is a data plane issue only.\n\n\n\n\u00A0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","state":0,"publishedAt":"2026-10-14T14:40:29.685+00:00","modifiedAt":"2026-10-15T16:43:46.354+00:00","affected":[{"ecosystem":"Vendor product","name":"NGINX JavaScript","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unknown\",\n                    \"modules\": [\n                        \"ngx_http_js_module\"\n                    ],\n                    \"product\": \"NGINX JavaScript\",\n                    \"vendor\": \"F5\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"1.0.2\",\n                            \"status\": \"affected\",\n                            \"version\": \"0.7.10\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","score":6.5,"severity":"MEDIUM"},{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","score":8.3,"severity":"HIGH"}],"references":["https://my.f5.com/manage/s/article/K000162615"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-101019","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-101019","identifiers":["CVE-2026-101019"]},"retained":false,"historicalAffected":[]}],"coverage":[]}