CVE-2026-119552

4.8 MEDIUMpublic exploit available

Published 2026-10-30 · Updated 2026-10-30

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD 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.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Weaknesses

CWE-367

Public exploit & PoC references

https://github.com/louislam/uptime-kuma
https://github.com/louislam/uptime-kuma/blob/2.5.8/server/server.js#L705-L722

All references

https://abraxaslabs.tech/research/uptime-kuma-setup-toctou
https://github.com/louislam/uptime-kuma
https://github.com/louislam/uptime-kuma/blob/2.5.8/server/server.js#L705-L722
https://www.vulncheck.com/advisories/uptime-kuma-through-2.5.8-race-condition-admin-creation-via-setup-handler

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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