{"cve":"CVE-2023-6787","nvd":{"published":"2024-04-25T16:15:10.867","modified":"2026-06-17T06:51:25.630","status":"Analyzed","description":"A flaw was found in Keycloak that occurs from an error in the re-authentication mechanism within org.keycloak.authentication. This flaw allows hijacking an active Keycloak session by triggering a new authentication process with the query parameter \"prompt=login,\" prompting the user to re-enter their credentials. If the user cancels this re-authentication by selecting \"Restart login,\" an account takeover may occur, as the new session, with a different SUB, will possess the same SID as the previous session.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-287"],"references":["https://access.redhat.com/errata/RHSA-2024:1867","https://access.redhat.com/errata/RHSA-2024:1868","https://access.redhat.com/security/cve/CVE-2023-6787","https://bugzilla.redhat.com/show_bug.cgi?id=2254375","https://github.com/keycloak/keycloak/security/advisories/GHSA-c9h6-v78w-52wj"],"products":["redhat:build_of_keycloak","redhat:keycloak"],"source":"nvd","synced_at":"2026-10-19T21:49:08.435428910+00:00"},"epss":{"cve":"CVE-2023-6787","score":0.00744,"percentile":0.54771,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-c9h6-v78w-52wj","url":"https://osv.dev/vulnerability/GHSA-c9h6-v78w-52wj","summary":"Keycloak vulnerable to session hijacking via re-authentication","modified":"2026-09-10T03:50:11.330581486Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":["<22.0.10"],"fixed":["22.0.10"]},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":[">=23.0.0 <24.0.3"],"fixed":["24.0.3"]}]}],"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."]}