---
cve: "CVE-2026-55698"
severity: "HIGH"
cvss: 8.8
epss: "26%"
vendor: "pnpm"
kev: false
exploited: false
published: "2026-06-25 18:16:40"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T10:03:38+02:00"
---

# CVE-2026-55698

> 8.8 HIGH · 🧪 PoC

## Beschreibung

pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm can persist package-manager bootstrap metadata in the first YAML document of pnpm-lock.yaml. Before the patch, direct pnpm execution trusted an already resolved packageManagerDependencies entry when the committed env lockfile contained matching pnpm and @pnpm/exe versions. A malicious repository could therefore commit package-manager lockfile package records and snapshots that bypassed fresh package-manager resolution, then cause pnpm to install and execute bytes selected by that committed lockfile state during automatic version switching. This vulnerability is fixed in 10.34.2 and 11.5.3.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 343441ca6257688fea9c5c4edc4feccf7f97c43b (Commit)
- b7195db5c8469c80908d625c648302b26c2f9977 (Commit)

## Referenzen

- <https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjp>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55698) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_