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    CVE-2026-42567

    Svelte is a performance oriented web framework. From version 5.51.5 to before version 5.55.7, an internal regex in the Svelte runtime can take exponential time to test in <svelte:element this={tag}></svelte:element>. This issue has been patched in version 5.55.7.

    Published:Jun 9, 2026
    Last Modified:Jun 11, 2026
    EPS:Jun 9, 2026
    EPSS Score:0.00039
    CVSS Score:7.5

    Affected Products

    Vendor
    Svelte
    Product
    Svelte

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-492 Regular Expression Exponential Blowup

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
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    Scope
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    Changed
    Confidentiality
    None
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    Integrity
    None
    Low
    High
    Availability
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    Low
    High