CVE-2026-54603
8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ruby-oauth | oauth2 | >= 0.4.0, < 2.0.22 | affected |
Weaknesses
- CWE-200: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
- CWE-601: CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
References
- https://github.com/ruby-oauth/oauth2/security/advisories/GHSA-pp92-crg2-gfv9
- https://github.com/ruby-oauth/oauth2/commit/0f0a474f1b38453e119e660c2daca742d4378ce9
- https://github.com/ruby-oauth/oauth2/releases/tag/v2.0.22
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