---
cve: "CVE-2025-59830"
severity: "HIGH"
cvss: 7.5
epss: "0.6%"
vendor: "rack"
kev: false
exploited: false
published: "2025-09-25 15:16:13"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T12:23:27+02:00"
---

# CVE-2025-59830

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Rack is a modular Ruby web server interface. Prior to version 2.2.18, Rack::QueryParser enforces its params_limit only for parameters separated by &, while still splitting on both & and ;. As a result, attackers could use ; separators to bypass the parameter count limit and submit more parameters than intended. Applications or middleware that directly invoke Rack::QueryParser with its default configuration (no explicit delimiter) could be exposed to increased CPU and memory consumption. This can be abused as a limited denial-of-service vector. This issue has been patched in version 2.2.18.

## 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)

- 0f76d43c0d5624bd0d325df4f0a63f5e1faa7254 (Commit)
- 54e4ffdd5affebcb0c015cc6ae74635c0831ed71 (Commit)

## Referenzen

- <https://github.com/rack/rack/security/advisories/GHSA-625h-95r8-8xpm>
- <https://github.com/rack/rack/commit/54e4ffdd5affebcb0c015cc6ae74635c0831ed71>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-59830) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_