{"affected":[{"package":{"ecosystem":"Hex","name":"xml_builder","purl":"pkg:hex/xml_builder"},"ranges":[{"events":[{"introduced":"0.0.1"},{"fixed":"2.4.1"}],"type":"SEMVER"}],"versions":["0.0.1","0.0.2","0.0.3","0.0.4","0.0.5","0.0.6","0.0.7","0.0.8","0.0.9","0.1.0","0.1.1","0.1.2","2.0.0","2.1.0","2.1.1","2.1.2","2.1.4","2.2.0","2.3.0","2.4.0"]},{"ranges":[{"events":[{"introduced":"9fb49131ad3ee146a4c9db9bc175bdffe32e30a0"},{"fixed":"d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859"}],"repo":"https://github.com/joshnuss/xml_builder","type":"GIT"}]}],"aliases":["GHSA-r82p-3q2p-728w","CVE-2026-48590"],"credits":[{"name":"Peter Ullrich","type":"FINDER"},{"name":"Joshua Nussbaum","type":"REMEDIATION_DEVELOPER"},{"name":"Jonatan Männchen / EEF","type":"COORDINATOR"}],"database_specific":{"capec_ids":["CAPEC-250"],"cpe_ids":["cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*"],"cwe_ids":["CWE-91"]},"details":"## Summary\n\nXML Injection vulnerability in joshnuss xml_builder (`XmlBuilder` module) allows Content Spoofing, XML Injection.\n\nThis vulnerability is associated with program files `lib/xml_builder.ex` and program routines `XmlBuilder.generate/1`, `XmlBuilder.generate/2`, `XmlBuilder.element/1`, `XmlBuilder.element/2`, `XmlBuilder.element/3`.\n\nElement names, attribute names, and doctype identifiers are interpolated verbatim into the serialized XML output without validation or escaping of structural characters (`<`, `>`, `\"`, `'`, `&`). An attacker who can influence a name argument (for example, an element name derived from a JSON object key or an HTTP form field name) can inject arbitrary XML markup including extra elements, comments, and event-handler attributes into the output document.\n\nThis issue affects xml_builder: from 0.0.1 before 2.4.1.","id":"EEF-CVE-2026-48590","modified":"2026-09-08T05:15:01.150842Z","published":"2026-08-21T09:51:25.412Z","references":[{"type":"ADVISORY","url":"https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w"},{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-48590.html"},{"type":"FIX","url":"https://github.com/joshnuss/xml_builder/commit/d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859"},{"type":"PACKAGE","url":"https://hex.pm/packages/xml_builder"}],"related":[],"schema_version":"1.7.3","severity":[{"score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N","type":"CVSS_V4"}],"summary":"Element and Attribute Names Injected Verbatim into XML Output in xml_builder","upstream":[]}