CVE-2021-41816

    Dashboard / Vulnerabilities / CVE-2021-41816

    CVE-2021-41816

    Published: 6 Feb 2022Last Modified: 20 Oct 2026

    Summary:

    Details: CGI.escape_html in Ruby before 2.7.5 and 3.x before 3.0.3 has an integer overflow and resultant buffer overflow via a long string on platforms (such as Windows) where size_t and long have different numbers of bytes. This also affects the CGI gem before 0.3.1 for Ruby.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/, https://security-tracker.debian.org/tracker/CVE-2021-41816, https://security.gentoo.org/glsa/202401-27, https://security.netapp.com/advisory/ntap-20220303-0006/, https://hackerone.com/reports/1328463, https://www.ruby-lang.org/en/news/2021/11/24/buffer-overrun-in-cgi-escape_html-cve-2021-41816/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -c9c800715ef268421ce7fbe9bc62d19a2ab67fee

    Affected versions

    v0.1.0

    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-2021-41816 | CVE-DB