---
cve: "CVE-2026-73088"
severity: "HIGH"
cvss: 7.5
epss: "36%"
vendor: "browserslist"
kev: false
exploited: false
published: "2026-08-11 17:19:16"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T23:41:00+02:00"
---

# CVE-2026-73088

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7.

## CVSS-Vektor

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

| 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 | Hoch | bad |

## Patch verfügbar (OSV)

- f9914ad9effc865ccc27d816255625890b31ca51 (Commit)
- b637868045806d2fba4c24eb0060e4cc8b1db276 (Commit)

## Referenzen

- <https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g>
- <https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51>
- <https://github.com/browserslist/browserslist/releases/tag/4.28.7>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-73088) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_