---
cve: "CVE-2026-73490"
severity: "MEDIUM"
cvss: 4.7
epss: "0.2%"
vendor: "flavorjones"
kev: false
exploited: false
published: "2026-08-12 21:17:42"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T14:47:44+02:00"
---

# CVE-2026-73490

> 4.7 MEDIUM · 🧪 PoC

## Beschreibung

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 20867b9be689521887364b74822c41ef830523c9 (Commit)
- 2706d7e858426ba856d9711b0e761b2fee7986c4 (Commit)

## Referenzen

- <https://github.com/flavorjones/loofah/security/advisories/GHSA-9wjq-cp2p-hrgf>
- <https://github.com/flavorjones/loofah/pull/308>
- <https://github.com/flavorjones/loofah/commit/20867b9be689521887364b74822c41ef830523c9>
- <https://github.com/flavorjones/loofah/releases/tag/v2.25.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-73490) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_