---
cve: "CVE-2026-70453"
severity: "HIGH"
cvss: 8.7
epss: "52%"
vendor: "RsyncProject"
kev: false
exploited: false
published: "2026-08-13 15:19:58"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T09:09:06+02:00"
---

# CVE-2026-70453

> 8.7 HIGH · 🧪 PoC

## Beschreibung

rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust receiver CPU resources with a modest number of crafted entries, causing a sustained 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)

- 471e17dc0d68233db84db11be82c9f62f4661214 (Commit)

## Referenzen

- <https://github.com/RsyncProject/rsync/security/advisories/GHSA-8x5r-mjx8-83hv>
- <https://github.com/RsyncProject/rsync/releases/tag/v3.5.0>
- <https://www.vulncheck.com/advisories/rsync-algorithmic-complexity-dos-via-hash-search>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-70453) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_