[ CVE-2026-119552 · Published 30 Oct 2026 ]
Vulnerability in louislam uptime-kuma
CVSS 4.8
EPSS <1%No fix listed yet
[ Description ]Official description
Uptime Kuma through 2.5.8 contains a race condition in the Socket.IO first-run setup handler that allows unauthenticated attackers to create an additional administrator account. Attackers can send concurrent setup requests during the bcrypt hashing window to bypass the empty user table check, then modify monitors, API keys, and enable disableAuth.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.