CVE-2026-47080
LowCVSS 2.1Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
XML Injection vulnerability in joshnuss xml_builder (XmlBuilder module) allows content spoofing and XML injection. The escape/1 function for CDATA data does not handle the ']]>' sequence, allowing premature closure and injection of arbitrary XML. Affects versions from 0.0.7 before 2.4.1.
Risk Assessment
An attacker can inject malicious XML elements into documents, potentially leading to content spoofing or attacks on XML processors.
Recommendation
Upgrade xml_builder to version 2.4.1 or later, which includes the fix for handling ']]>'.
Other vulnerabilities in xml_builder
See all- CVE-2026-48590Low
XML Injection vulnerability in joshnuss xml_builder (XmlBuilder module) allows content spoofing and XML injection. Element names, attribute names, and doctype identifiers are interpolated without validation, allowing injection of arbitrary XML markup. Affects versions from 0.0.1 before 2.4.1.
- CVE-2026-47079Low
Inappropriate Encoding for Output Context vulnerability in joshnuss xml_builder (XmlBuilder module) allows content spoofing and cross-site scripting. XmlBuilder.generate/1 does not escape '&' characters when followed by entity-like tokens, allowing injection of XML markup. Affects versions from 0.0.6 before 2.4.1.
Original NVD description (English source)
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.