{"cve":"CVE-2021-3637","nvd":{"published":"2021-07-09T11:15:09.997","modified":"2026-06-17T04:05:29.093","status":"Modified","description":"A flaw was found in keycloak-model-infinispan in keycloak versions before 14.0.0 where authenticationSessions map in RootAuthenticationSessionEntity grows boundlessly which could lead to a DoS attack.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1979638","https://bugzilla.redhat.com/show_bug.cgi?id=1979638"],"products":["redhat:keycloak","redhat:single_sign-on"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-3637","score":0.01129,"percentile":0.66389,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2vp8-jv5v-6qh6","url":"https://osv.dev/vulnerability/GHSA-2vp8-jv5v-6qh6","summary":"Allocation of resources without limits or throttling in keycloak-model-infinispan","modified":"2023-11-08T04:06:13.156654Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-model-infinispan","purl":"pkg:maven/org.keycloak/keycloak-model-infinispan","ranges":["<14.0.0"],"fixed":["14.0.0"]}]}],"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."]}