---
cve: "CVE-2026-70452"
severity: "CRITICAL"
cvss: 9.1
epss: "46%"
vendor: "RsyncProject"
kev: false
exploited: false
published: "2026-08-13 15:19:58"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T17:30:24+02:00"
---

# CVE-2026-70452

> 9.1 CRITICAL · 🧪 PoC

## Beschreibung

rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circumvent hosts deny rules by inducing DNS resolution failures during hostname-based access control evaluation. When a DNS lookup for a hostname-based deny rule fails, the daemon skips the rule rather than defaulting to a deny decision, enabling attackers who can trigger DNS failures to bypass module-level IP access controls and gain unauthorized access to restricted module file trees.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/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)

- 471e17dc0d68233db84db11be82c9f62f4661214 (Commit)

## Referenzen

- <https://github.com/RsyncProject/rsync/security/advisories/GHSA-6692-28cx-wpqq>
- <https://github.com/RsyncProject/rsync/releases/tag/v3.5.0>
- <https://www.vulncheck.com/advisories/rsync-access-control-bypass-via-dns-resolution-failure>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-70452) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_