---
cve: "CVE-2026-71190"
severity: "HIGH"
cvss: 8.7
epss: "47%"
vendor: "OpenStack"
kev: false
exploited: false
published: "2026-08-05 06:16:40"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-05T23:00:57+02:00"
---

# CVE-2026-71190

> 8.7 HIGH

## Beschreibung

In OpenStack Swift through 2.38.0, the proxy server Accept header parser contains a regular expression vulnerable to catastrophic backtracking (ReDoS). The "qdtext" pattern (?:[^"]|\\.)* allows an unauthenticated remote attacker to send a crafted Accept header that causes exponential CPU consumption in the proxy worker. A payload of 32 backslash-character pairs exceeds 30 seconds of CPU time. No authentication is required. Repeated requests can exhaust all proxy worker threads, resulting in a complete denial of service.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- fc875f93e82edf98805d0eead3e3c961673c3ef8 (Commit)
- deaa3e4691bb19224f5ef57e7fbcd08b7eff5277 (Commit)

## Referenzen

- <https://launchpad.net/bugs/2158771>
- <https://openwall.com/lists/oss-security/2026/07/28/27>
- <https://security.openstack.org/ossa/OSSA-2026-031.html>
- <http://www.openwall.com/lists/oss-security/2026/08/05/19>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-71190) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_