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    2 vulnerabilities found for oauth2 by ruby-oauth

    CVE-2026-54603 (GCVE-0-2026-54603)

    Vulnerability from nvd – Published: 2026-07-28 16:29 – Updated: 2026-07-29 13:52
    VLAI
    Title
    OAuth2::Client#request: Protocol-relative redirect Location overrides authority, leaking bearer Authorization to attacker host
    Summary
    OAuth2 is a Ruby wrapper for the OAuth 2.0 and 2.1 authorization frameworks, including OpenID Connect (OIDC). From 0.4.0 to 2.0.21, a protocol-relative redirect Location returned to OAuth2::Client#request overrides the request authority, so the bearer Authorization header is sent to an attacker-controlled host, leaking the credential. This issue is fixed in version 2.0.22.
    Severity
    8.6 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
    Assigner
    References
    Impacted products
    Vendor Product Version
    ruby-oauth oauth2 Affected: >= 0.4.0, < 2.0.22
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-54603 (GCVE-0-2026-54603)

    Vulnerability from cvelistv5 – Published: 2026-07-28 16:29 – Updated: 2026-07-29 13:52
    VLAI
    Title
    OAuth2::Client#request: Protocol-relative redirect Location overrides authority, leaking bearer Authorization to attacker host
    Summary
    OAuth2 is a Ruby wrapper for the OAuth 2.0 and 2.1 authorization frameworks, including OpenID Connect (OIDC). From 0.4.0 to 2.0.21, a protocol-relative redirect Location returned to OAuth2::Client#request overrides the request authority, so the bearer Authorization header is sent to an attacker-controlled host, leaking the credential. This issue is fixed in version 2.0.22.
    Severity
    8.6 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
    Assigner
    References
    Impacted products
    Vendor Product Version
    ruby-oauth oauth2 Affected: >= 0.4.0, < 2.0.22
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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