CVE Intelligence

Ruby-oauth Oauth2 vulnerabilities

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Published CVEs affecting Ruby-oauth Oauth2: 1 record(s), with affected versions and fixes.

CVE-2026-54603 High · 8.6 CWE-200 Jul 28, 2026
OAuth2::Client#request: Protocol-relative redirect Location overrides authority, leaking bearer Authorization to attacker host
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.