---
cve: "CVE-2026-54282"
severity: "LOW"
cvss: 3.7
epss: "0.2%"
vendor: "Kludex"
kev: false
exploited: false
published: "2026-06-22 18:16:46"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T14:38:07+02:00"
---

# CVE-2026-54282

> 3.7 LOW · 🧪 PoC

## Beschreibung

Starlette is a lightweight ASGI framework/toolkit. Prior to 1.3.0, the HTTP request path is not validated before being used to reconstruct request.url. Because request.url is rebuilt by concatenating {scheme}://{host}{path} and re-parsing the result, a path that does not begin with / (for example @google.com) moves the authority boundary during re-parsing, so request.url.hostname and request.url.netloc become attacker-controlled. Code that reads request.url.hostname (rather than the Host header or scope) can therefore be misled into trusting an attacker-supplied host. This vulnerability is fixed in 1.3.0.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 5f8610c386e13de1d80d36efa961e1486a1d2d01 (Commit)

## Referenzen

- <https://github.com/Kludex/starlette/security/advisories/GHSA-jp82-jpqv-5vv3>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-54282) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_