CVE-2026-48590
Element and Attribute Names Injected Verbatim into XML Output in xml_builder
- State
- Published
- Severity
- 2.1 Low
- Published
- Aug 21, 2026
- Updated
- Aug 21, 2026
- Reserved
- May 22, 2026
Description
XML Injection vulnerability in joshnuss xml_builder (XmlBuilder module) allows Content Spoofing, XML Injection.
This 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.
Element 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.
This issue affects xml_builder: from 0.0.1 before 2.4.1.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.1 Low | 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 | EEF |
Weaknesses
- CWE-91 XML Injection (aka Blind XPath Injection)
Affected Products
| Product | Versions |
|---|---|
xml_builderjoshnuss |
|
xml_builderjoshnuss |
|
References
- https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728wvendor-advisoryrelated
- https://cna.erlef.org/cves/CVE-2026-48590.htmlrelated
- https://osv.dev/vulnerability/EEF-CVE-2026-48590related
- https://github.com/joshnuss/xml_builder/commit/d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859patch
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