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    CVE-2026-28499

    LeafKit is a templating language with Swift-inspired syntax. Prior to version 1.14.2, HTML escaping doesn't work correctly when a template prints a collection (Array / Dictionary) via `#(value)`. This can result in XSS, allowing potentially untrusted input to be rendered unescaped. Version 1.14.2 fixes the issue.

    Published:Mar 18, 2026
    Last Modified:Mar 24, 2026
    EPS:Mar 18, 2026
    EPSS Score:0.0001
    CVSS Score:6.1

    Affected Products

    Vendor
    Vapor
    Product
    Leafkit

    Exploits

    https://github.com/vapor/leaf-kit/security/advisories/GHSA-6jj5-j4j8-8473https://github.com/vapor/leaf-kit/security/advisories/GHSA-6jj5-j4j8-8473

    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