{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-9784", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2025-09-01T06:33:05.239Z", "datePublished": "2025-09-02T13:37:59.772Z", "dateUpdated": "2026-09-04T19:51:36.446Z" }, "containers": { "cna": { "title": "Undertow: undertow madeyoureset http/2 ddos vulnerability", "metrics": [ { "other": { "content": { "value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "format": "CVSS" } ], "descriptions": [ { "lang": "en", "value": "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 malicious clients to induce excessive server workload by repeatedly causing server-side stream aborts. While not a protocol bug, this highlights a common implementation weakness that can be exploited to cause a denial of service (DoS)." } ], "affected": [ { "versions": [ { "status": "affected", "version": "0", "lessThan": "2.2.38.Final", "versionType": "semver" } ], "packageName": "undertow", "collectionURL": "https://github.com/undertow-io/undertow/", "defaultStatus": "unaffected" }, { "vendor": "Red Hat", "product": "Red Hat build of Apache Camel 4.14.2 for Spring Boot 3.5.8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "packageName": "undertow-core", "cpes": [ "cpe:/a:redhat:apache_camel_spring_boot:4.14" ] }, { "vendor": "Red Hat", "product": "Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "eap7-undertow", "defaultStatus": "affected", "versions": [ { "version": 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