Bug 2508093 (CVE-2026-54603) - CVE-2026-54603 oauth2: OAuth2: Credential leakage via protocol-relative redirect
Summary: CVE-2026-54603 oauth2: OAuth2: Credential leakage via protocol-relative redirect
Keywords:
Status: NEW
Alias: CVE-2026-54603
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-28 17:45 UTC by OSIDB Bzimport
Modified: 2026-09-23 22:02 UTC (History)
6 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-28 17:45:08 UTC 
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.
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