---
cve: "CVE-2026-67855"
severity: "HIGH"
cvss: 7.5
epss: "29%"
vendor: "n/a"
kev: false
exploited: false
published: "2026-08-04 22:17:15"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T03:45:46+02:00"
---

# CVE-2026-67855

> 7.5 HIGH · 🧪 PoC

## Beschreibung

open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.

## 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 |

## Referenzen

- <https://github.com/open62541/open62541>
- <https://github.com/open62541/open62541/issues/8093>
- <https://github.com/open62541/open62541/blob/master/src/server/ua_server_ns0_gds.c>
- <https://github.com/open62541/open62541/blob/master/arch/posix/eventloop_posix.c>
- <https://github.com/open62541/open62541/blob/master/src/server/ua_server_internal.h>
- <https://github.com/open62541/open62541/blob/master/examples/encryption/server_encryption.c>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-67855) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_