EEF-CVE-2026-47079
- Source
- https://cna.erlef.org/osv/EEF-CVE-2026-47079.html
- Import Source
- https://cna.erlef.org/osv/EEF-CVE-2026-47079.json
- JSON Data
- https://api.osv.dev/v1/vulns/EEF-CVE-2026-47079
- Aliases
-
- CVE-2026-47079
- GHSA-5hjx-8g53-cmvm
- Published
- 2026-08-21T09:52:44.178Z
- Modified
- 2026-08-21T10:11:02.035343414Z
- Severity
-
- 2.1 (Low) CVSS_V4 - 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 CVSS Calculator
- Summary
- Round-trip Corruption via Improper Entity Escaping in xml_builder
- Details
-
Summary
Inappropriate Encoding for Output Context vulnerability in joshnuss xml_builder (XmlBuilder module) allows Content Spoofing, Cross-site Scripting.
This vulnerability is associated with program files lib/xml_builder.ex and program routines XmlBuilder.generate/1, XmlBuilder.generate/2, XmlBuilder.escape_string/1, XmlBuilder.escape_entity/1.
XmlBuilder.generate/1 does not escape literal & characters in text or attribute values when they are followed by an entity-like token (lt;, gt;, amp;, quot;, apos;). As a result, attacker-supplied input such as <script> is emitted verbatim into the serialized XML rather than being escaped to <script>. When a downstream XML parser later reads the document, it decodes the entity sequences into the literal characters <script>, promoting inert-looking text into real markup. This allows an attacker to bypass upstream filters that block raw < and > characters, injecting markup into any downstream consumer that parses the produced XML and renders the text content in a markup-sensitive context (HTML, SVG, RSS/Atom feeds). Both element text and attribute values are affected.
This issue affects xml_builder: from 0.0.6 before 2.4.1.
- Database specific
{ "capec_ids": [ "CAPEC-120" ], "cwe_ids": [ "CWE-838" ], "cpe_ids": [ "cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*" ] }- References
- Credits
-
-
- Peter Ullrich - FINDER
-
- Joshua Nussbaum - REMEDIATION_DEVELOPER
-
- Jonatan Männchen / EEF - COORDINATOR
-
Affected packages
Hex / xml_builder
Package
- Name
- xml_builder
- Purl
- pkg:hex/xml_builder