{"action":"Upgrade undertow to 2.3.20-1 or later.","affected":[{"fixed":"2.3.20-1","introduced":"0"}],"component":"undertow","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["2.3.20-1"],"id":"tcs_01M5NPEXEKRS3P7YG2ASHS553B","modified_at":"2026-10-15T09:47:27.256453374Z","published_at":"2025-09-02T14:15:36.593Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-9784","https://security-tracker.debian.org/tracker/CVE-2025-9784"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-9784","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-9784"}],"summary":"A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters. This issue, referred to as the \"MadeYouReset\" attack, allows malic"}