{"cve":"CVE-2016-9589","nvd":{"published":"2018-03-12T15:29:00.273","modified":"2026-06-17T00:56:17.913","status":"Modified","description":"Undertow in Red Hat wildfly before version 11.0.0.Beta1 is vulnerable to a resource exhaustion resulting in a denial of service. Undertow keeps a cache of seen HTTP headers in persistent connections. It was found that this cache can easily exploited to fill memory with garbage, up to \"max-headers\" (default 200) * \"max-header-size\" (default 1MB) per active TCP connection.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["http://rhn.redhat.com/errata/RHSA-2017-0830.html","http://rhn.redhat.com/errata/RHSA-2017-0831.html","http://rhn.redhat.com/errata/RHSA-2017-0832.html","http://rhn.redhat.com/errata/RHSA-2017-0834.html","http://rhn.redhat.com/errata/RHSA-2017-0876.html"],"products":["redhat:jboss_wildfly_application_server"],"source":"nvd","synced_at":"2026-10-19T20:48:50.842038930+00:00"},"epss":{"cve":"CVE-2016-9589","score":0.02965,"percentile":0.87227,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-p4xg-cpr9-vwvj","url":"https://osv.dev/vulnerability/GHSA-p4xg-cpr9-vwvj","summary":"Red Hat Wildfly DoS","modified":"2024-02-17T05:36:42.235937Z","packages":[{"ecosystem":"Maven","name":"org.wildfly:wildfly-undertow","purl":"pkg:maven/org.wildfly/wildfly-undertow","ranges":["<11.0.0.Beta1"],"fixed":["11.0.0.Beta1"]}]}],"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."]}