---
cve: "CVE-2026-47080"
severity: "LOW"
cvss: 2.1
epss: "0.2%"
vendor: "joshnuss"
kev: false
exploited: false
published: "2026-08-21 09:49:34"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T00:40:08+02:00"
---

# CVE-2026-47080

> 2.1 LOW · 🧪 PoC

## Beschreibung

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  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.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- bfb1ada071ccc1e384c30f782197ca5154106706 (Commit)

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-47080) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_