{"cve":"CVE-2023-6291","nvd":{"published":"2024-01-26T15:15:08.280","modified":"2026-09-22T04:17:56.317","status":"Modified","description":"A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L","score":7.1},"cwes":["CWE-601"],"references":["https://access.redhat.com/errata/RHSA-2023:7854","https://access.redhat.com/errata/RHSA-2023:7855","https://access.redhat.com/errata/RHSA-2023:7856","https://access.redhat.com/errata/RHSA-2023:7857","https://access.redhat.com/errata/RHSA-2023:7858"],"products":["redhat:keycloak","redhat:migration_toolkit_for_applications","redhat:openshift_container_platform","redhat:openshift_container_platform_for_ibm_z","redhat:openshift_container_platform_for_linuxone","redhat:openshift_container_platform_for_power","redhat:single_sign-on"],"source":"nvd","synced_at":"2026-10-19T21:44:57.175229480+00:00"},"epss":{"cve":"CVE-2023-6291","score":0.0095,"percentile":0.6126,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-mpwq-j3xf-7m5w","url":"https://osv.dev/vulnerability/GHSA-mpwq-j3xf-7m5w","summary":"The redirect_uri validation logic allows for bypassing explicitly allowed hosts that would otherwise be restricted","modified":"2024-02-16T08:12:43.498216Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":["<23.0.3"],"fixed":["23.0.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}