---
cve: "CVE-2026-44431"
severity: "HIGH"
cvss: 8.2
epss: "33%"
vendor: "urllib3"
kev: false
exploited: false
published: "2026-05-13 16:16:57"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T03:02:47+02:00"
---

# CVE-2026-44431

> 8.2 HIGH · 🧪 PoC

## Beschreibung

urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 9a950b92d999f906b6020bb2d1076ee56cddd5d2 (Commit)

## Referenzen

- <https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc>
- <https://lists.debian.org/debian-lts-announce/2026/06/msg00040.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-44431) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_