{"id":"CVE-2026-48590","summary":"Element and Attribute Names Injected Verbatim into XML Output in xml_builder","details":"XML 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 (\u003c, \u003e, \", ', &). 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.","aliases":["EEF-CVE-2026-48590","GHSA-r82p-3q2p-728w"],"modified":"2026-08-27T11:31:02.701731979Z","published":"2026-08-21T09:51:25.412Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"0.0.1"},{"fixed":"2.4.1"},{"introduced":"9fb49131ad3ee146a4c9db9bc175bdffe32e30a0"},{"fixed":"d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"introduced":"0.0.1"},{"fixed":"2.4.1"}],"source":"CPE_FIELD"},{"source":"DESCRIPTION","extracted_events":[{"introduced":"0.0.1"},{"fixed":"2.4.1"}]}],"cna_assigner":"EEF","cwe_ids":["CWE-91"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48590.json"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-48590.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-48590"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48590.json"},{"type":"ADVISORY","url":"https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48590"},{"type":"FIX","url":"https://github.com/joshnuss/xml_builder/commit/d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859"},{"type":"PACKAGE","url":"https://github.com/joshnuss/xml_builder"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/joshnuss/xml_builder","events":[{"introduced":"0"},{"fixed":"d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v0.0.6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48590.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}