CVE-2026-92289
Description
A flaw was found in lemonldap-ng. When configured to accept either client secrets or Proof Key for Code Exchange (PKCE, a security mechanism designed to protect authorization codes), the portal fails to validate client credentials properly for public clients. A remote attacker who intercepts an authorization code can exploit this flaw by submitting an arbitrary secret to the token endpoint. This allows the attacker to bypass PKCE validation and obtain the victim's access, identity, and refresh tokens, leading to unauthorized account access.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
Frequently Asked Questions
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