GHSA-98m9-hrrm-r99r

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    GHSA-98m9-hrrm-r99r

    Published: 19 Jun 2026Last Modified: 10 Sept 2026

    Summary: Faraday: Uncontrolled recursion in NestedParamsEncoder allows stack exhaustion DoS via deeply nested query parameters

    Details: `Faraday::NestedParamsEncoder`, the default nested query parameter encoder/decoder in Faraday, decodes nested query strings without enforcing a maximum nesting depth. A crafted query string such as: ```text a[x][x][x][x]...[x]=1 ``` causes Faraday to build a deeply nested Ruby `Hash` structure. The internal `dehash` routine then recursively walks this attacker-controlled structure without a depth limit. At sufficient depth, Ruby raises an uncaught `SystemStackError` (`stack level too deep`), crashing the calling thread or worker. This can lead to denial of service in applications that pass attacker-controlled query strings to Faraday's nested query parsing or URL-building paths. This has been patched in version 2.14.3 and backported to 1.10.6.

    References: https://github.com/lostisland/faraday/security/advisories/GHSA-98m9-hrrm-r99r, https://nvd.nist.gov/vuln/detail/CVE-2026-54297, https://github.com/lostisland/faraday/pull/1681, https://github.com/lostisland/faraday, https://github.com/lostisland/faraday/releases/tag/v1.10.6, https://github.com/lostisland/faraday/releases/tag/v2.14.3

    Affected packages

    Package

    Name: faraday

    Purl: pkg:gem/faraday

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 2.0.0
    Fixed -2.14.3

    Affected versions

    2.0.0
    2.0.1

    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-98m9-hrrm-r99r | CVE-DB