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    CVE-2026-27122

    svelte performance oriented web framework. Prior to 5.51.5, when using <svelte:element this={tag}> in server-side rendering, the provided tag name is not validated or sanitized before being emitted into the HTML output. If the tag string contains unexpected characters, it can result in HTML injection in the SSR output. Client-side rendering is not affected. This vulnerability is fixed in 5.51.5.

    Published:Feb 20, 2026
    Last Modified:Apr 18, 2026
    EPS:Feb 20, 2026
    EPSS Score:0.00011
    CVSS Score:5.4

    Affected Products

    Vendor
    Svelte
    Product
    Svelte

    Exploits

    No exploit reference

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    Common Vulnerability Scoring System

    Attack Vector
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    Physical
    Privileges Required
    None
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    High
    User Interaction
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    Scope
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    Confidentiality
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    Integrity
    None
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    Availability
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