GHSA-jxhc-q857-3j6g

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    GHSA-jxhc-q857-3j6g

    Published: 12 Jul 2021Last Modified: 8 Jul 2026

    Summary: Regular Expression Denial of Service in Addressable templates

    Details: ### Impact Within the URI template implementation in Addressable, a maliciously crafted template may result in uncontrolled resource consumption, leading to denial of service when matched against a URI. In typical usage, templates would not normally be read from untrusted user input, but nonetheless, no previous security advisory for Addressable has cautioned against doing this. Users of the parsing capabilities in Addressable but not the URI template capabilities are unaffected. ### Patches The vulnerability was introduced in version 2.3.0 (previously yanked) and has been present in all subsequent versions up to, and including, 2.7.0. It is fixed in version 2.8.0. ### Workarounds The vulnerability can be avoided by only creating Template objects from trusted sources that have been validated not to produce catastrophic backtracking. ### References - https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS - https://cwe.mitre.org/data/definitions/1333.html - https://www.regular-expressions.info/catastrophic.html ### For more information If you have any questions or comments about this advisory: * [Open an issue](https://github.com/sporkmonger/addressable/issues)

    References: https://github.com/sporkmonger/addressable/security/advisories/GHSA-jxhc-q857-3j6g, https://nvd.nist.gov/vuln/detail/CVE-2021-32740, https://github.com/sporkmonger/addressable/commit/0d8a3127e35886ce9284810a7f2438bff6b43cbc, https://github.com/sporkmonger/addressable/commit/89c76130ce255c601f642a018cb5fb5a80e679a7, https://github.com/sporkmonger/addressable/commit/92685096b1f7235ed8986c03ce30a24972eed848#diff-fb36d3dc67e6565ffde17e666a98697f48e76dac38fabf1bb9e97cdf3b583d76, https://github.com/advisories/GHSA-jxhc-q857-3j6g, https://github.com/rubysec/ruby-advisory-db/blob/master/gems/addressable/CVE-2021-32740.yml, https://github.com/sporkmonger/addressable, https://lists.fedoraproject.org/archives/list/[email protected]/message/SDFQM2NHNAZ3NNUQZEJTYECYZYXV4UDS, https://lists.fedoraproject.org/archives/list/[email protected]/message/WYPVOOQU7UB277UUERJMCNQLRCXRCIQ5

    Affected packages

    Package

    Name: addressable

    Purl: pkg:gem/addressable

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 2.3.0
    Fixed -2.8.0

    Affected versions

    2.3.2
    2.3.3
    2.3.4
    2.3.5
    2.3.6
    2.3.7
    2.3.8

    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
    GHSA-jxhc-q857-3j6g | CVE-DB