CVE-2026-63183

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    CVE-2026-63183

    Published: 4 Nov 2026Last Modified: 7 Nov 2026

    Summary: OmniAuth: Host Header Injection Vulnerability

    Details: OmniAuth is a flexible authentication system utilizing Rack middleware. Prior to 2.2.0, OmniAuth derives provider callback URLs from request-controlled host information when neither a fixed full_host nor framework-level incoming host validation is configured. A remote unauthenticated client can supply a forged Host header, creating a host header injection risk in applications whose web framework does not verify incoming host headers. Applications using appropriately configured Rails host authorization or a fixed full_host are not affected by this path. This issue is fixed in version 2.2.0.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63183.json, https://github.com/omniauth/omniauth/security/advisories/GHSA-m27g-v28p-f9fx, https://nvd.nist.gov/vuln/detail/CVE-2026-63183, https://github.com/omniauth/omniauth/commit/943b44faea242f063fa9230254fe7d60cfcc9c90

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -0d3807816151b08da1a84b600f0260d83d2f4aee

    Affected versions

    v2.1.4
    v2.1.3
    v2.1.2
    v2.1.1
    v2.1.0

    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-2026-63183 | CVE-DB