CVE-2026-54603

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.

• CWE-200
• CWE-601

• https://github.com/ruby-oauth/oauth2/commit/0f0a474f1b38453e119e660c2daca742d4378ce9
• https://github.com/ruby-oauth/oauth2/releases/tag/v2.0.22
• https://github.com/ruby-oauth/oauth2/security/advisories/GHSA-pp92-crg2-gfv9
• https://github.com/ruby-oauth/oauth2/security/advisories/GHSA-pp92-crg2-gfv9

Published

Jul 28, 2026

Last Modified

Jul 29, 2026

Status

Received

• One Click Account Takeover in GranolaHow a notification link broke out of Electron and led to a one-click account takeover.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-54591AsyncSSH is a Python package which provides an asynchronous …8.1
• CVE-2026-54592Oj (Optimized JSON) is a JSON parser and Object marshaller p…7.5
• CVE-2026-54593Pterodactyl is a free, open-source game server management pa…8.1
• CVE-2026-5460A heap use-after-free exists in wolfSSL's TLS 1.3 post-quant…6.5
• CVE-2026-54601FastGPT is an open source AI knowledge base platform. From 4…6.3
• CVE-2026-54602FastGPT is a knowledge-based AI application platform. Prior …7.1
• CVE-2026-54605OAuth is a Ruby wrapper for the OAuth 1.0 and 1.0a protocols…7.2
• CVE-2026-54607FastGPT is a knowledge-based AI application platform. Prior …7.7
• CVE-2026-54609QTI Neon is a minimal, game-agnostic, relay-based UDP multip…8.6
• CVE-2026-54619sqlite3 provides Ruby bindings for the SQLite3 embedded data…2
• CVE-2026-5462A vulnerability was identified in Wahoo Fitness SYSTM App up…3.3
• CVE-2026-54620sqlite3 provides Ruby bindings for the SQLite3 embedded data…2