---
cve: "CVE-2026-54283"
severity: "HIGH"
cvss: 7.5
epss: "40%"
vendor: "Kludex"
kev: false
exploited: false
published: "2026-06-22 18:16:46"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T01:10:25+02:00"
---

# CVE-2026-54283

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Starlette is a lightweight ASGI framework/toolkit. From 0.4.1 until 1.3.1, request.form() accepts max_fields and max_part_size to bound resource consumption while parsing form data. These limits are enforced for multipart/form-data, but silently ignored for application/x-www-form-urlencoded. An unauthenticated attacker can therefore send a urlencoded body with an arbitrarily large number of fields or an arbitrarily large field, even when the application configured limits it believed would apply. This vulnerability is fixed in 1.3.1.

## 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)

- 8ebffd0678570ddd5d5bb11c6f3c3c7fd4682ab9 (Commit)

## Referenzen

- <https://github.com/Kludex/starlette/security/advisories/GHSA-82w8-qh3p-5jfq>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-54283) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_