---
cve: "CVE-2026-19931"
severity: "LOW"
cvss: 3.1
epss: "2.6%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-09-06 18:17:20"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T00:49:22+02:00"
---

# CVE-2026-19931

> 3.1 LOW

## Beschreibung

A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given
hostname using Negotiate authentication, when the initial request is done
using empty credentials. This can make user B's request get sent over user A's
previously authenticated connection.

## Referenzen

- <https://curl.se/docs/CVE-2026-19931.html>
- <https://curl.se/docs/CVE-2026-19931.json>
- <https://hackerone.com/reports/3923520>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-19931) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_