ruby-oauth2: OAuth2 is a Ruby wrapper for the OAuth 2.0 and 2.1 authorization frameworks, including OpenID Connect (OIDC)
CVE-2026-54603 is fixed in ruby-oauth2 on 1 platform, first by DEBIAN-CVE-2026-54603, released August 15, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| ruby-oauth2 · Debian 12.15 (bookworm) | 1.4.4-1+deb12u1 | DEBIAN-CVE-2026-54603 | Aug 15, 2026 |
| ruby-oauth2 · Debian 14 | 2.0.25-1 | DEBIAN-CVE-2026-54603 | Aug 15, 2026 |
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