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.
Metrics
Affected Vendors & Products
References
History
Fri, 30 Oct 2026 17:30:00 +0000
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ssvc
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Fri, 30 Oct 2026 11:45:00 +0000
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| 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. | |
| Title | Uptime Kuma through 2.5.8 Race Condition Admin Creation via Setup Handler | |
| First Time appeared |
Uptime-kuma Project
Uptime-kuma Project uptime-kuma |
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| Weaknesses | CWE-367 | |
| CPEs | cpe:2.3:a:uptime-kuma_project:uptime-kuma:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Uptime-kuma Project
Uptime-kuma Project uptime-kuma |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-10-30T11:31:03.438Z
Updated: 2026-10-30T15:54:36.118Z
Reserved: 2026-10-30T10:53:26.670Z
Link: CVE-2026-119552
Updated: 2026-10-30T15:21:05.571Z
Status : Deferred
Published: 2026-10-30T12:16:42.100
Modified: 2026-10-30T19:23:25.493
Link: CVE-2026-119552
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