CVE-2026-53977 OpenChamber 1.11.7 Unauthenticated DoS via /api/system/shutdown
Unauthenticated attackers can shut down the OpenChamber server by exploiting route registration order, causing denial of service for all users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53977?
CVE-2026-53977 is a high-severity authentication bypass vulnerability in Bohdan Triapitsyn OpenChamber, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-53977?
How do I fix CVE-2026-53977?
No fix has been published for CVE-2026-53977 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-53977 being exploited?
There is no known exploitation of CVE-2026-53977 in the wild and no public exploit code.
Sources
Also known as GHSA-hw79-7vhm-4hc6.