---
cve: "CVE-2026-59948"
severity: "HIGH"
cvss: 7.0
epss: "14%"
vendor: "composer"
kev: false
exploited: false
published: "2026-07-08 20:16:59"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T11:07:44+02:00"
---

# CVE-2026-59948

> 7.0 HIGH · 🧪 PoC

## Beschreibung

Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a maliciously crafted package from an untrusted repository other than Packagist.org or Private Packagist can cause Composer to write attacker-controlled files outside the vendor directory and outside the project during install or update by using an invalid package name that is not correctly validated before dependency-resolution results are written or installed. This issue is fixed in versions 2.2.29 and 2.10.2.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Hoch | good |
| 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)

- ccbe57917efe30262ce80463fc4a6182c5ac29ed (Commit)
- 8d4439f572a97670a9edc039eb3b093cc976b4bc (Commit)

## Referenzen

- <https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9>
- <https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0>
- <https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1>
- <https://github.com/composer/composer/releases/tag/2.10.2>
- <https://github.com/composer/composer/releases/tag/2.2.29>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-59948) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_