---
cve: "CVE-2026-53597"
severity: "HIGH"
cvss: 8.7
epss: "93%"
vendor: "Microsoft"
kev: false
exploited: false
published: "2026-07-16 16:19:12"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-02T15:33:56+02:00"
---

# CVE-2026-53597

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Prompty is a markdown file format (.prompty) for LLM prompts. From 2.0.0-alpha.1 until 2.0.0-beta.3, the @prompty/core TypeScript loader in runtime/typescript/packages/core/src/core/loader.ts used gray-matter without overriding executable js and javascript frontmatter engines, allowing an attacker-controlled .prompty file with ---js frontmatter to execute arbitrary JavaScript during prompt loading. This issue is fixed in version 2.0.0-beta.3.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- c27402da2487075be577f06aa79df627fb9d6853 (Commit)

## Referenzen

- <https://github.com/microsoft/prompty/security/advisories/GHSA-c4gh-rv8h-q9vw>
- <https://github.com/microsoft/prompty/commit/c27402da2487075be577f06aa79df627fb9d6853>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-53597) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_