CVE-2026-105302
A flaw was found in the User Session Note mapper of the Keycloak identity and access management solution. The issue occurs because the mapper does not validate whether a requested session note contains sensitive internal credentials, such as federated access tokens from external identity providers. This allows a delegated client administrator to leak a user's upstream bearer tokens into the tokens issued to their managed application, potentially leading to unauthorized access to the user's data on external platforms.
- Published Oct 5, 2026
- CVSS 5.7 medium
- 0.2% chance of exploitation in the next 30 days (EPSS)