CVE-2026-48590
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.
What this means for your business
- FIRST's prediction model gives it a 0.2% chance of attack attempts being seen in the next 30 days, ranking above 6% of all known flaws.
What to do
- 1Ask your IT team or provider whether any of your systems use the affected product.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
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Scoring
- CVSS
- Not yet scored
- CVSS v4
- 2.1
- Weakness
- CWE-91
- Assigned by
- 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Dates
- Published
- 2026-08-21
- Last modified
- 2026-08-24
- Sources
- NVD
References
- https://cna.erlef.org/cves/CVE-2026-48590.html
- https://github.com/joshnuss/xml_builder/commit/d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859
- https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w
- https://osv.dev/vulnerability/EEF-CVE-2026-48590
- https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w