---
cve: "CVE-2026-53977"
severity: "HIGH"
cvss: 8.7
epss: "0.5%"
vendor: "Bohdan Triapitsyn"
kev: false
exploited: false
published: "2026-08-06 16:16:43"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T04:01:42+02:00"
---

# CVE-2026-53977

> 8.7 HIGH · 🧪 PoC

## Beschreibung

OpenChamber 1.11.7 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to terminate the server process by sending a POST request to the /api/system/shutdown endpoint, which is registered before the authentication middleware in the Express route handler chain. Attackers can exploit the route registration order in bootstrap-runtime.js to reach the shutdown handler before auth middleware executes, causing denial of service to all active AI coding sessions and locking out legitimate remote users regardless of whether UI_PASSWORD is configured.

## 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)

- f1b9506132faf6c564a2694c7f33b94421a49b4a (Commit)

## Referenzen

- <https://github.com/openchamber/openchamber>
- <https://github.com/openchamber/openchamber/commit/f1b9506132faf6c564a2694c7f33b94421a49b4a>
- <https://www.vulncheck.com/advisories/openchamber-unauthenticated-dos-via-api-system-shutdown>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-53977) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_