{"cve":"CVE-2026-1529","nvd":{"published":"2026-02-09T20:15:55.883","modified":"2026-07-15T02:18:16.307","status":"Deferred","description":"A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","score":8.1},"cwes":["CWE-347"],"references":["https://access.redhat.com/errata/RHSA-2026:2363","https://access.redhat.com/errata/RHSA-2026:2364","https://access.redhat.com/errata/RHSA-2026:2365","https://access.redhat.com/errata/RHSA-2026:2366","https://access.redhat.com/security/cve/CVE-2026-1529"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:22:27.261130201+00:00"},"epss":{"cve":"CVE-2026-1529","score":0.00494,"percentile":0.42425,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-hcvw-475w-8g7p","url":"https://osv.dev/vulnerability/GHSA-hcvw-475w-8g7p","summary":"Keycloak affected by improper invitation token validation","modified":"2026-02-13T20:56:19.441578Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":[">=26.5.0 <26.5.3"],"fixed":["26.5.3"]},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":["<26.2.13"],"fixed":["26.2.13"]},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":[">=26.3.0 <26.4.9"],"fixed":["26.4.9"]}]}],"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."]}