---
cve: "CVE-2026-3784"
severity: "MEDIUM"
cvss: 6.5
epss: "30%"
vendor: "curl"
kev: false
exploited: false
published: "2026-03-11 11:16:00"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T03:43:44+02:00"
---

# CVE-2026-3784

> 6.5 MEDIUM

## Beschreibung

curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a
server, even if the new request uses different credentials for the HTTP proxy.
The proper behavior is to create or use a separate connection.

## CVSS-Vektor

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

| 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 | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 2eebc58c4b8d68c98c8344381a9f6df4cca838fd (Commit)

## Referenzen

- <https://curl.se/docs/CVE-2026-3784.json>
- <https://curl.se/docs/CVE-2026-3784.html>
- <https://hackerone.com/reports/3584903>
- <http://www.openwall.com/lists/oss-security/2026/03/11/3>
- <https://cert-portal.siemens.com/productcert/html/ssa-253495.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-3784) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_