---
cve: "CVE-2026-45798"
severity: "HIGH"
cvss: 7.5
epss: "0.5%"
vendor: "wazuh"
kev: false
exploited: false
published: "2026-08-19 17:18:49"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T13:11:21+02:00"
---

# CVE-2026-45798

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.5.0 until 4.14.6 and 5.0.0-beta2, compare_wazuh_versions() in src/shared/version_op.c copies the attacker-controlled enrollment V: field into a 10-byte stack buffer with strncpy() but does not explicitly terminate the buffer. The function is reachable before authentication through wazuh-authd on TCP port 1515 when anonymous TLS enrollment is enabled. A version string of at least nine non-null bytes can cause strchr() and strtok() to read beyond ver2 and can make strtok() write a null byte into adjacent stack memory, allowing a remote denial of service. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.

## CVSS-Vektor

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

| 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 | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 44c2925b46bd058d2426bd44ed1b3e5d7b7b03b4 (Commit)
- b6aac379982d6144b8da38450cbea6c8dc15be44 (Commit)

## Referenzen

- <https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r>
- <https://github.com/wazuh/wazuh/pull/36059>
- <https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44>
- <https://github.com/wazuh/wazuh/releases/tag/v4.14.6>
- <https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-45798) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_