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OpenAdvisories
Medium · 4.7 CVE-2026-105118 EUVD-2026-92022GHSA-mxvw-rw3m-5c33

OpenAM before 16.1.3 Open Redirect via Unverified id_token_hint in endSession

Published Oct 3, 2026 · Updated Oct 5, 2026 · Assigned by VulnCheck

Description

OpenAM before 16.1.3 contains an open redirect vulnerability that allows unauthenticated attackers to redirect users by supplying an unverified id_token_hint to the /oauth2/connect/endSession endpoint. Attackers can name any realm client in a forged hint to redirect victims to any registered post-logout URI, enabling phishing that borrows the OpenAM host's trust.

Affected products

VendorProductAffectedFixed
OpenIdentityPlatform OpenAM < 16.1.3 16.1.3

References