---
cve: "CVE-2026-73427"
severity: "LOW"
cvss: 2.1
epss: "0.3%"
vendor: "basecamp"
kev: false
exploited: false
published: "2026-08-12 20:50:17"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T23:14:28+02:00"
---

# CVE-2026-73427

> 2.1 LOW · 🧪 PoC

## Beschreibung

Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Prior to 2.1.18, Trix is vulnerable to cross-site scripting when a crafted application/x-trix-document JSON payload is dropped into an editor using the fallback Level0InputController, such as an embedded WebView without Input Events Level 2 support. The StringPiece.fromJSON method trusts href attributes from the JSON payload without sanitization, allowing a draggable element containing a javascript: URI to bypass DOMPurify sanitization and inject executable JavaScript into the DOM. Exploitation requires the victim to drag and drop attacker-controlled content, and server-side HTML sanitization can neutralize the payload on save. This issue is fixed in version 2.1.18.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- 9c0a993d9fc2ffe9d56b013b030bc238f9c0557c (Commit)
- da8869922e19bc3f852091468d34029af80813e7 (Commit)

## Referenzen

- <https://github.com/basecamp/trix/security/advisories/GHSA-53p3-c7vp-4mcc>
- <https://github.com/basecamp/trix/pull/1293>
- <https://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c>
- <https://github.com/basecamp/trix/releases/tag/v2.1.18>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-73427) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_