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    CVE-2026-23644

    esm.sh is a no-build content delivery network (CDN) for web development. Prior to Go pseeudoversion 0.0.0-20260116051925-c62ab83c589e, the software has a path traversal vulnerability due to an incomplete fix. `path.Clean` normalizes a path but does not prevent absolute paths in a malicious tar file. Commit https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16, corresponding to pseudoversion 0.0.0-20260116051925-c62ab83c589e, fixes this issue.

    Published:Jan 18, 2026
    Last Modified:Apr 18, 2026
    EPS:Jan 18, 2026
    EPSS Score:0.00106
    CVSS Score:7.5

    Affected Products

    Vendor
    Esm
    Product
    Esm.sh
    Vendor
    Esm-dev
    Product
    Esmsh

    Exploits

    https://pkg.go.dev/vuln/GO-2025-4138

    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