---
cve: "CVE-2026-59868"
severity: "MEDIUM"
cvss: 5.3
epss: "0.6%"
vendor: "nodeca"
kev: false
exploited: false
published: "2026-07-08 16:16:33"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T20:07:16+02:00"
---

# CVE-2026-59868

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

js-yaml is a JavaScript YAML parser and dumper. From 5.0.0 before 5.2.0, when merge keys are enabled, js-yaml can spend quadratic CPU time parsing a document whose size grows only linearly when a chain of mappings uses merge keys where each mapping merges the previous one. This issue is fixed in version 5.2.0.

## CVSS-Vektor

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

| 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 | Keine | good |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- c28ed5ec1aa66a37b8202e17d0caa122922a1b00 (Commit)
- 3105455b81dee69e0fd36e09ac0b2ccfdb54adc1 (Commit)

## Referenzen

- <https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv>
- <https://github.com/nodeca/js-yaml/commit/3105455b81dee69e0fd36e09ac0b2ccfdb54adc1>
- <https://github.com/nodeca/js-yaml/releases/tag/5.2.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-59868) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_