Vulnerability 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.
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-47080.html
- https://github.com/joshnuss/xml_builder/commit/bfb1ada071ccc1e384c30f782197ca515
- https://github.com/joshnuss/xml_builder/security/advisories/GHSA-67r9-hmxw-h595
- https://osv.dev/vulnerability/EEF-CVE-2026-47080
- https://vincent.vulcoord.net/score/?state=Not+Scored&year=2026&year=2025&assigne
FAQ
What is CVE-2026-47080?
CVE-2026-47080 is a documented vulnerability. 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 rout...
How severe is CVE-2026-47080?
CVSS scoring is not yet available for CVE-2026-47080. Check NVD for updates.
Is there a patch for CVE-2026-47080?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.