CVE-2026-119552

    Dashboard / Vulnerabilities / CVE-2026-119552

    CVE-2026-119552

    Published: 30 Oct 2026Last Modified: 1 Nov 2026

    Summary: Uptime Kuma through 2.5.8 Race Condition Admin Creation via Setup Handler

    Details: 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.

    References: https://abraxaslabs.tech/research/uptime-kuma-setup-toctou, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119552.json, https://nvd.nist.gov/vuln/detail/CVE-2026-119552, https://www.vulncheck.com/advisories/uptime-kuma-through-2.5.8-race-condition-admin-creation-via-setup-handler, https://github.com/louislam/uptime-kuma, https://github.com/louislam/uptime-kuma/blob/2.5.8/server/server.js#L705-L722

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.5.8
    2.5.7
    2.5.6
    2.5.5
    2.5.4
    2.5.3
    2.5.2
    2.5.1
    2.5.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-119552 | CVE-DB