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.escape/1. The escape/1 clause for {:cdata, data} in lib/xml_builder.ex concatenates data verbatim between the CDATA opener <![CDATA[ and closer ]]> without rewriting or splitting on the embedded ]]> sequence. Because CDATA sections have no internal escape mechanism, the only safe way to embed arbitrary bytes is to split on ]]> and emit adjacent CDATA sections. An attacker who can supply input containing ]]> closes the CDATA section early; any bytes that follow are parsed as ordinary XML markup by downstream consumers, allowing injection of arbitrary elements, text, or entity references into the output document. This issue affects xml_builder: from 0.0.7 before 2.4.1.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
joshnuss xml_builder
Default version status: unaffected
0.0.7 to < 2.4.1affected
pkg:hex/xml_builderjoshnuss xml_builder
Default version status: unaffected
26766f884ed19adee1563522c7afb5f056a6f3b5 to < bfb1ada071ccc1e384c30f782197ca5154106706affected
pkg:github/joshnuss/xml_builderReferences
- https://github.com/joshnuss/xml_builder/security/advisories/GHSA-67r9-hmxw-h595 ↗
- https://cna.erlef.org/cves/CVE-2026-47080.html ↗
- https://osv.dev/vulnerability/EEF-CVE-2026-47080 ↗
- https://github.com/joshnuss/xml_builder/commit/bfb1ada071ccc1e384c30f782197ca5154106706 ↗
- https://vincent.vulcoord.net/score/?state=Not+Scored&year=2026&year=2025&assigned_to=88bc49d9-8ddd-4227-affc-a613e67abc4d&ordering=-published&cve=CVE-2026-47080 ↗