Medium severity4.8NVD Advisory· Published Oct 30, 2026
CVE-2026-119552
CVE-2026-119552
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.
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Affected products
1- Range: <=2.5.8
Patches
Vulnerability mechanics
References
3News mentions
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