CVE-2021-27292

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    CVE-2021-27292

    Published: 17 Mar 2021Last Modified: 7 Aug 2026

    Summary:

    Details: ua-parser-js >= 0.7.14, fixed in 0.7.24, uses a regular expression which is vulnerable to denial of service. If an attacker sends a malicious User-Agent header, ua-parser-js will get stuck processing it for an extended period of time.

    References: https://github.com/faisalman/ua-parser-js/commit/809439e20e273ce0d25c1d04e111dcf6011eb566, https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14, https://gist.github.com/b-c-ds/6941d80d6b4e694df4bc269493b7be76

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 7ae3098778572742544385938a2726c4efa01a02
    Fixed -9999815ac8c969306594c650566695fba3506830

    Affected versions

    0.7.21
    0.7.20
    0.7.19
    0.7.18
    0.7.14

    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-2021-27292 | CVE-DB