CVE-2021-36773

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    CVE-2021-36773

    Published: 18 Jul 2021Last Modified: 8 Jul 2026

    Summary:

    Details: uBlock Origin before 1.36.2 and nMatrix before 4.4.9 support an arbitrary depth of parameter nesting for strict blocking, which allows crafted web sites to cause a denial of service (unbounded recursion that can trigger memory consumption and a loss of all blocking functionality).

    References: https://lists.debian.org/debian-lts-announce/2022/06/msg00024.html, https://news.ycombinator.com/item?id=27833752, https://github.com/vtriolet/writings/blob/main/posts/2021/ublock_origin_and_umatrix_denial_of_service.adoc

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -8b5733a58d3acf9fb62815e14699c986bd1c2fdc

    Affected versions

    1.36.0

    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
    CVE-2021-36773 | CVE-DB