CVE-2026-18208

A flaw was found in the OIDC token introspection endpoint of the keycloak-services component. Keycloak is an open-source identity and access management solution used to secure modern applications and services. The issue occurs when a confidential client, configured to receive signed JWT introspection responses, attempts to introspect a token issued for a different audience. Although the endpoint correctly identifies the token as inactive for that client, it still returns the full set of token claims within a signed JWT field. This allows an unauthorized client to bypass audience-based restrictions and access sensitive information contained in the token.

• CWE-862

• https://access.redhat.com/security/cve/CVE-2026-18208Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2508304Issue Tracking, Vendor Advisory

Published

Jul 31, 2026

Last Modified

Aug 7, 2026

Status

Analyzed

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
• 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-2026-1820The Media Library Alt Text Editor plugin for WordPress is vu…6.4
• CVE-2026-18200The FoodBoxBooker WordPress plugin before 1.0.8 does not ver…4.3
• CVE-2026-18201Keycloak provides a way to manage identity providers and org…5.5
• CVE-2026-18203A flaw was found in the group policy evaluation logic of Key…6.5
• CVE-2026-18206A flaw was found in the keycloak-services component of Keycl…3.7
• CVE-2026-18207A flaw was found in the client policy enforcement mechanism …6.5
• CVE-2026-18209A flaw was found in the keycloak-services component of Keycl…4.7
• CVE-2026-1821The Microtango plugin for WordPress is vulnerable to Stored …6.4
• CVE-2026-18211A flaw was found in the secure-client-uris client policy exe…5.4
• CVE-2026-18214Keycloak allows users to log in using Google accounts and ca…8.1
• CVE-2026-18215Keycloak provides a way to let users log in using Microsoft …8.1
• CVE-2026-18217A flaw was found in the SAML protocol implementation of Keyc…4.7