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    Dashboard / CVE / CVE-2026-82455

    CVE-2026-82455

    RubyGems fails to re-validate path containment after filesystem symlink resolution during gem extraction. When a pre-existing symlink inside the destination directory points outside the extraction root, extracted files that appear to be written under the destination directory can instead be written outside of it, breaking the extraction safety boundary. The fix resolves the real path of the parent directory before writing and raises Gem::Package::PathError if it escapes the destination directory.

    Published:Aug 29, 2026
    Last Modified:Aug 31, 2026
    EPS:Aug 29, 2026
    EPSS Score:0.00144
    CVSS Score:7.1

    Affected Products

    Vendor
    Rubygems
    Product
    Rubygems

    Exploits

    No exploit reference

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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