{"id":"CVE-2024-4027","aliases":["CLSA-2026-1776126822","CLSA-2026-1778546708","CLSA-2026-1784769562","CLSA-2026-1786429714","CLSA-2026-1794162270","CLSA-2026-1794162511","CLSA-2026-1794162761","CLSA-2026-1794163073","CLSA-2026-1794235099","CLSA-2026-1794235365","CLSA-2026-1794235562","CLSA-2026-1794235949","CLSA-2026-1794236374","CLSA-2026-1794236816","CLSA-2026-1794246287","CLSA-2026-1794246653","DEBIAN-CVE-2024-4027","EUVD-2024-32593","GHSA-33hj-rcmx-86mv","OESA-2026-1386","OESA-2026-1387","OESA-2026-1388","OESA-2026-1389","OESA-2026-1390","OESA-2026-1431","UBUNTU-CVE-2024-4027"],"status":"published","title":"Undertow: outofmemoryerror in httpservletrequestimpl.getparameternames() can cause remote dos attacks","description":"A flaw was found in Undertow. Servlets using a method that calls HttpServletRequestImpl.getParameterNames() can cause an OutOfMemoryError when the client sends a request with large parameter names. This issue can be exploited by an unauthorized user to cause a remote denial-of-service (DoS) attack.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00401,"percentile":0.34671,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-770"],"published":"2026-01-30T14:25:54Z","modified":"2026-11-10T01:15:04Z","fixes":[{"ecosystem":"Maven","package":"io.undertow:undertow-core","fixed_in":["2.2.39.Final","2.4.0.Beta1","2.3.21.Final"],"sources":["ghsa","osv"]},{"ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","fixed_in":["2.3.10.Final-tuxcare.5","2.3.20.Final-tuxcare.1","2.2.33.Final-tuxcare.7"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.39.Final"}]}]},{"source":"ghsa","ecosystem":"Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0.Alpha1"},{"last_affected":"2.4.0.Alpha1"},{"fixed":"2.4.0.Beta1"}]}],"versions":["2.4.0.Alpha1"]},{"source":"ghsa","ecosystem":"Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.0.Alpha1"},{"fixed":"2.3.21.Final"}]}]},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.18.Final"},{"fixed":"2.3.18.Final-tuxcare.1"}]}],"versions":["2.3.18.Final"],"bundled":3},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.10.Final"},{"fixed":"2.3.10.Final-tuxcare.5"}]}],"versions":["2.3.10.Final","2.3.10.Final-tuxcare.1","2.3.10.Final-tuxcare.2","2.3.10.Final-tuxcare.3","2.3.10.Final-tuxcare.4"]},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.20.Final"},{"fixed":"2.3.20.Final-tuxcare.1"}]}],"versions":["2.3.20.Final"]},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.17.Final"},{"fixed":"2.3.17.Final-tuxcare.1"}]}],"versions":["2.3.17.Final"],"bundled":3},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.27.Final"},{"fixed":"1.4.27.Final-tuxcare.4"}]}],"versions":["1.4.27.Final","1.4.27.Final-tuxcare.1","1.4.27.Final-tuxcare.2","1.4.27.Final-tuxcare.3"],"bundled":4},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-servlet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.27.Final"},{"fixed":"1.4.27.Final-tuxcare.4"}]}],"versions":["1.4.27.Final","1.4.27.Final-tuxcare.1","1.4.27.Final-tuxcare.2","1.4.27.Final-tuxcare.3"],"bundled":4},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.26.Final"},{"fixed":"2.0.26.Final-tuxcare.2"}]}],"versions":["2.0.26.Final","2.0.26.Final-tuxcare.1"],"bundled":11},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.37.Final"},{"fixed":"2.2.37.Final-tuxcare.1"}]}],"versions":["2.2.37.Final"],"bundled":3},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.33.Final"},{"fixed":"2.2.33.Final-tuxcare.7"}]}],"versions":["2.2.33.Final","2.2.33.Final-tuxcare.1","2.2.33.Final-tuxcare.2","2.2.33.Final-tuxcare.3","2.2.33.Final-tuxcare.4","2.2.33.Final-tuxcare.5","2.2.33.Final-tuxcare.6"]},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.7.Final"},{"fixed":"2.2.7.Final-tuxcare.1"}]}],"versions":["2.2.7.Final"],"bundled":11},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.1.7.Final"},{"fixed":"2.1.7.Final-tuxcare.1"}]}],"versions":["2.1.7.Final"],"bundled":11},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.32.Final"},{"fixed":"2.0.32.Final-tuxcare.1"}]}],"versions":["2.0.32.Final"],"bundled":10},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.1.4.Final"},{"fixed":"2.1.4.Final-tuxcare.1"}]}],"versions":["2.1.4.Final"],"bundled":11},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.undertow:undertow-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.20.Final"},{"fixed":"2.2.20.Final-tuxcare.1"}]}],"versions":["2.2.20.Final"],"bundled":12},{"source":"osv","ecosystem":"TuxCare:Mav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7"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2024-4027","tags":["vdb-entry","x_refsource_REDHAT","web","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2276410","tags":["issue-tracking","x_refsource_REDHAT","web","report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-4027.json","tags":["x_sadp-csaf-vex"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-4027","tags":["advisory"]},{"url":"https://github.com/undertow-io/undertow/commit/6b7c18481ce65ae4012d92fe2b7f17a21ef4d70b","tags":["web"]},{"url":"https://github.com/undertow-io/undertow/releases/tag/2.3.21.Final","tags":["web"]},{"url":"https://issues.redhat.com/browse/UNDERTOW-2377","tags":["web"]},{"url":"https://github.com/undertow-io/undertow/pull/1860","tags":["web"]},{"url":"https://github.com/undertow-io/undertow/pull/1882","tags":["web"]},{"url":"https://github.com/undertow-io/undertow/pull/1894","tags":["web"]},{"url":"https://github.com/undertow-io/undertow/commit/8318dd36fdc2c9842baf10c5f1bfbb3bc23f75e7","tags":["web"]},{"url":"https://github.com/undertow-io/undertow/commit/cb854c779b9e2368c3c274ebd7217c8e75d505be","tags":["web"]},{"url":"https://github.com/undertow-io/undertow/commit/fb14baa51b611a4a9f755f1d8b07d6e12eac68e3","tags":["web"]},{"url":"https://github.com/undertow-io/undertow/releases/tag/2.2.39.Final","tags":["web"]},{"url":"https://github.com/undertow-io/undertow/releases/tag/2.4.0.Beta1","tags":["web"]},{"url":"https://github.com/advisories/GHSA-33hj-rcmx-86mv"},{"url":"https://security-tracker.debian.org/tracker/CVE-2024-4027","tags":["advisory"]},{"url":"https://github.com/undertow-io/undertow","tags":["package"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1386","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-3884","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1387","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1388","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1389","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1390","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1431","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2024-4027","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-4027","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2024-4027","title":"Undertow: 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