{"cve":"CVE-2020-14359","nvd":{"published":"2021-02-23T13:15:12.443","modified":"2026-06-17T02:54:37.183","status":"Modified","description":"A vulnerability was found in all versions of Keycloak Gatekeeper, where on using lower case HTTP headers (via cURL) an attacker can bypass our Gatekeeper. Lower case headers are also accepted by some webservers (e.g. Jetty). This means there is no protection when we put a Gatekeeper in front of a Jetty server and use lowercase headers.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","score":7.3},"cwes":["CWE-305"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1868591","https://issues.jboss.org/browse/KEYCLOAK-14090","https://bugzilla.redhat.com/show_bug.cgi?id=1868591","https://issues.jboss.org/browse/KEYCLOAK-14090"],"products":["redhat:louketo_proxy"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2020-14359","score":0.0093,"percentile":0.60619,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-jh6m-3pqw-242h","url":"https://osv.dev/vulnerability/GHSA-jh6m-3pqw-242h","summary":"Keycloak Gatekeeper vulnerable to bypass on using lower case HTTP headers","modified":"2023-11-08T04:02:26.597517Z","packages":[{"ecosystem":"Go","name":"github.com/keycloak/keycloak-gatekeeper","purl":"pkg:golang/github.com/keycloak/keycloak-gatekeeper","ranges":["<=1.2.8"],"fixed":[]}]}],"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."]}