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.
Published: 2026-10-30
Score: 6.3 Medium
EPSS: n/a
KEV: No
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Fri, 30 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 30 Oct 2026 11:45:00 +0000

Type Values Removed Values Added
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
Weaknesses CWE-367
CPEs cpe:2.3:a:uptime-kuma_project:uptime-kuma:*:*:*:*:*:*:*:*
Vendors & Products Uptime-kuma Project
Uptime-kuma Project uptime-kuma
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Uptime-kuma Project Uptime-kuma
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-30T15:54:36.118Z

Reserved: 2026-10-30T10:53:26.670Z

Link: CVE-2026-119552

cve-icon Vulnrichment

Updated: 2026-10-30T15:21:05.571Z

cve-icon NVD

Status : Received

Published: 2026-10-30T12:16:42.100

Modified: 2026-10-30T16:17:45.577

Link: CVE-2026-119552

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-30T13:15:15Z

Weaknesses
  • CWE-367

    Time-of-check Time-of-use (TOCTOU) Race Condition