{"id":"CVE-2026-105302","title":"A flaw was found in the User Session Note mapper of the Keycloak identity and access management solution","summary":"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, suc…","severity":"medium","cvss":5.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","cwe":["CWE-200"],"vendor":"Red Hat","product":"keycloak-services","affected":["keycloak-services (all versions)","rhbk/keycloak-rhel9 (all versions)","keycloak-services"],"published":"2026-10-05","updated":"2026-10-05","sourceUpdated":"2026-10-05T06:16:58.383","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-105302","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-105302","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545800","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-105302.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-105302"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105302"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-10-05T06:13:49.198Z","slug":"CVE-2026-105302","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Build of Keycloak · no fix planned: Red Hat Build of Keycloak · updated 2026-10-05 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-105302.json)","depth":"sunlit","depthScore":31,"depthScoreParts":{"impact":31.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}