---
cve: "CVE-2026-100527"
severity: "MEDIUM"
cvss: 6.9
epss: "0.4%"
vendor: "OpenClaw"
kev: false
exploited: false
published: "2026-09-26 03:16:57"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-28T16:41:11+02:00"
---

# CVE-2026-100527

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

OpenClaw before 2026.8.2 contains a denial of service vulnerability in the Browser extension relay that allows unauthenticated network sources to exhaust pending-authentication capacity. Attackers can hold every pending slot by maintaining silent WebSocket upgrades, preventing paired extensions from completing Browser Relay Authentication v2.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-26 02:18:29
- CNA-CVSS: **6.9** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`)

## CVSS-Vektor

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

- 0965053fe6b9341776df147a6934b7485c60b5ca (Commit)

## Referenzen

- <https://github.com/openclaw/openclaw/security/advisories/GHSA-m78m-7h3q-q938>
- <https://www.vulncheck.com/advisories/openclaw-before-2026.8.2-denial-of-service-via-browser-relay>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-100527) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_