{"id":"DEBIAN-CVE-2026-101019","details":"Description NGINX 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.  Impact In 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. There is no control plane exposure; this is a data plane issue only.     Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","modified":"2026-10-15T05:00:57.926226983Z","published":"2026-10-14T15:17:01.697Z","upstream":["CVE-2026-101019"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-101019"}],"affected":[{"package":{"name":"libnginx-mod-js","ecosystem":"Debian:12","purl":"pkg:deb/debian/libnginx-mod-js?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.12-1","0.7.12-2","0.7.12-2~exp1","0.7.12-2~exp2","0.7.9-2","0.8.0-1","0.8.1-1","0.8.2-1","0.8.4-1","0.8.5-1","0.8.9-1","0.9.1-1","0.9.4-1","0.9.6-1","0.9.8-1","0.9.9-1","0.9.9-2","1.0.0-1","1.0.0-2","1.0.0-3","1.0.0-4","1.0.1-1","1.0.2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-101019.json"}},{"package":{"name":"libnginx-mod-js","ecosystem":"Debian:13","purl":"pkg:deb/debian/libnginx-mod-js?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.9-1","0.9.1-1","0.9.4-1","0.9.6-1","0.9.8-1","0.9.9-1","0.9.9-2","1.0.0-1","1.0.0-2","1.0.0-3","1.0.0-4","1.0.1-1","1.0.2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-101019.json"}},{"package":{"name":"libnginx-mod-js","ecosystem":"Debian:14","purl":"pkg:deb/debian/libnginx-mod-js?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.9-1","0.9.1-1","0.9.4-1","0.9.6-1","0.9.8-1","0.9.9-1","0.9.9-2","1.0.0-1","1.0.0-2","1.0.0-3","1.0.0-4","1.0.1-1","1.0.2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-101019.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N"}]}