---
cve: "CVE-2026-27645"
severity: "MEDIUM"
cvss: 6.1
epss: "0.4%"
vendor: "dgtlmoon"
kev: false
exploited: false
published: "2026-02-25 05:17:26"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T06:06:40+02:00"
---

# CVE-2026-27645

> 6.1 MEDIUM · 🧪 PoC

## Beschreibung

changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, the RSS single-watch endpoint reflects the UUID path parameter directly in the HTTP response body without HTML escaping. Since Flask returns text/html by default for plain string responses, the browser parses and executes injected JavaScript. Version 0.54.1 contains a fix for the issue.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| 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)

- f9048af6e834f70fc183e8dcee36eb4e740a6278 (Commit)
- a385c89abf44b52fcfa20c7c6a6dd3047c4c1eb5 (Commit)

## Referenzen

- <https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-mw8m-398g-h89w>
- <https://github.com/dgtlmoon/changedetection.io/commit/a385c89abf44b52fcfa20c7c6a6dd3047c4c1eb5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-27645) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_