{"id":"CVE-2026-3260","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-3260","summary":"Undertow: Denial of Service via Multipart/Form-Data Parsing on HTTP GET Requests","details":"A flaw was found in Undertow. A remote attacker could exploit this vulnerability by sending an HTTP GET request containing multipart/form-data content. If the underlying application processes parameters using methods like `getParameterMap()`, the server prematurely parses and stores this content to disk. This could lead to resource exhaustion, potentially resulting in a Denial of Service (DoS).","published":"2026-03-24T06:31:13Z","modified":"2026-09-10T03:50:36.926888194Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.00441,"percentile":0.35447,"asOf":"2026-07-06"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.undertow:undertow-core","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3260"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-3260"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2443010"},{"type":"PACKAGE","url":"https://github.com/undertow-io/undertow"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:50:36.926888194Z"}}