{"id":"CVE-2023-6927","title":"A flaw was found in Keycloak","summary":"A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode \"form_post.jwt\" which could be used to bypass the security patch implemented to…","severity":"medium","cvss":4.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","cwe":["CWE-601"],"vendor":"redhat","product":"keycloak","affected":["keycloak","single_sign-on = 7.0"],"published":"2023-12-18","updated":"2026-09-22","sourceUpdated":"2026-09-22T04:17:56.923","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-6927","references":[{"url":"https://access.redhat.com/errata/RHSA-2024:0094","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0095","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0096","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0097","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0098","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0100","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0101","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0798","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0799","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0800","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0801","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0804","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2023-6927","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2255027","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0094","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0095","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0096","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0097","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0098","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0100","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0101","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0798","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0799","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0800","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0801","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0804","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/security/cve/CVE-2023-6927","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2255027","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-6927.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-6927"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6927"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.01109,"epssPercentile":0.63935,"ingestedAt":"2026-09-22T03:57:48.896Z","patched":["single_sign_on_7_6_for_rhel_7_server","middleware_containers_for_openshift","single_sign_on_7_6_for_rhel 8","build_of_keycloak 22","single_sign_on_7_6_for_rhel 9","single_sign_on 7","build_of_keycloak 22.0.8","single_sign_on 7.6.6"],"slug":"CVE-2023-6927","body":"## Overview\n\nA flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode \"form_post.jwt\" which could be used to bypass the security patch implemented to address CVE-2023-6134.\n\n## Affected\n\n- `keycloak`\n- `single_sign-on = 7.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2024:0094** · Red Hat · fixed in: Red Hat Single Sign-On 7.6 for RHEL 7 Server · released 2024-01-09 · [advisory](https://access.redhat.com/errata/RHSA-2024:0094)\n- **RHSA-2024:0798** · Red Hat · fixed in: Red Hat Single Sign-On 7.6 for RHEL 7 Server · released 2024-02-13 · [advisory](https://access.redhat.com/errata/RHSA-2024:0798)\n- **RHSA-2024:0801** · Red Hat · fixed in: Middleware Containers for OpenShift · released 2024-02-13 · [advisory](https://access.redhat.com/errata/RHSA-2024:0801)\n- **RHSA-2024:0097** · Red Hat · fixed in: Middleware Containers for OpenShift · released 2024-01-09 · [advisory](https://access.redhat.com/errata/RHSA-2024:0097)\n- **RHSA-2024:0095** · Red Hat · fixed in: Red Hat Single Sign-On 7.6 for RHEL 8 · released 2024-01-09 · [advisory](https://access.redhat.com/errata/RHSA-2024:0095)\n- **RHSA-2024:0799** · Red Hat · fixed in: Red Hat Single Sign-On 7.6 for RHEL 8 · released 2024-02-13 · [advisory](https://access.redhat.com/errata/RHSA-2024:0799)\n- **RHSA-2024:0100** · Red Hat · fixed in: Red Hat build of Keycloak 22 · released 2024-01-09 · [advisory](https://access.redhat.com/errata/RHSA-2024:0100)\n- **RHSA-2024:0096** · Red Hat · fixed in: Red Hat Single Sign-On 7.6 for RHEL 9 · released 2024-01-09 · [advisory](https://access.redhat.com/errata/RHSA-2024:0096)\n- **RHSA-2024:0800** · Red Hat · fixed in: Red Hat Single Sign-On 7.6 for RHEL 9 · released 2024-02-13 · [advisory](https://access.redhat.com/errata/RHSA-2024:0800)\n- **RHSA-2024:0804** · Red Hat · fixed in: Red Hat Single Sign-On 7 · released 2024-02-13 · [advisory](https://access.redhat.com/errata/RHSA-2024:0804)\n- **RHSA-2024:0101** · Red Hat · fixed in: Red Hat build of Keycloak 22.0.8 · released 2024-01-09 · [advisory](https://access.redhat.com/errata/RHSA-2024:0101)","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}