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    CVE-2025-26042

    Uptime Kuma >== 1.23.0 has a ReDoS vulnerability, specifically when an administrator creates a notification through the web service. If a string is provided it triggers catastrophic backtracking in the regular expression, leading to a ReDoS attack.

    Published:Mar 17, 2025
    Last Modified:Apr 15, 2026
    EPS:Mar 17, 2025
    EPSS Score:0.00039
    CVSS Score:6

    Affected Products

    Vendor
    Uptime.kuma
    Product
    Uptime Kuma

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-492 Regular Expression Exponential Blowup

    Related CVEs

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    CVE-2023-49805 (CVSS 6) — Uptime Kuma is an easy-to-use self-hosted monitoring tool. Prior to version 1.23.9, the application uses WebSo…
    CVE-2023-49804 (CVSS 6.7) — Uptime Kuma is an easy-to-use self-hosted monitoring tool. Prior to version 1.23.9, when a user changes their …
    CVE-2023-49276 (CVSS 6.3) — Uptime Kuma is an open source self-hosted monitoring tool. In affected versions the Google Analytics element i…
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    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