---
cve: "CVE-2025-64718"
severity: "MEDIUM"
cvss: 5.3
epss: "0.4%"
vendor: "nodeca"
kev: false
exploited: false
published: "2025-11-13 16:15:57"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T14:47:54+02:00"
---

# CVE-2025-64718

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

js-yaml is a JavaScript YAML parser and dumper. In js-yaml before 4.1.1 and 3.14.2, it's possible for an attacker to modify the prototype of the result of a parsed yaml document via prototype pollution (`__proto__`). All users who parse untrusted yaml documents may be impacted. The problem is patched in js-yaml 4.1.1 and 3.14.2. Users can protect against this kind of attack on the server by using `node --disable-proto=delete` or `deno` (in Deno, pollution protection is on by default).

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 9963d366dfbde0c69722452bcd40b41e7e4160a0 (Commit)
- cc482e775913e6625137572a3712d2826170e53a (Commit)

## Referenzen

- <https://github.com/nodeca/js-yaml/security/advisories/GHSA-mh29-5h37-fv8m>
- <https://github.com/nodeca/js-yaml/issues/730#issuecomment-3549635876>
- <https://github.com/nodeca/js-yaml/commit/383665ff4248ec2192d1274e934462bb30426879>
- <https://github.com/nodeca/js-yaml/commit/5278870a17454fe8621dbd8c445c412529525266>
- <https://github.com/advisories/GHSA-mh29-5h37-fv8m>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-64718) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_