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    CVE-2026-6654

    Double-Free / Use-After-Free (UAF) in the `IntoIter::drop` and `ThinVec::clear` functions in the thin_vec crate. A panic in `ptr::drop_in_place` skips setting the length to zero.

    Published:Apr 20, 2026
    Last Modified:May 12, 2026
    EPS:Apr 20, 2026
    EPSS Score:0.00016
    CVSS Score:5.1

    Affected Products

    Vendor
    Mozilla
    Product
    Thin-vec

    Exploits

    https://github.com/mozilla/thin-vec/security/advisories/GHSA-xphw-cqx3-667j

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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