GHSA-6H4F-PJ3G-Q8FQ

Vulnerability from github – Published: 2025-12-03 21:31 – Updated: 2026-01-21 21:20
VLAI?
Summary
Undertow OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded
Details

A flaw was found in Undertow that can cause remote denial of service attacks. When the server uses the FormEncodedDataDefinition.doParse(StreamSourceChannel) method to parse large form data encoding with application/x-www-form-urlencoded, the method will cause an OutOfMemory issue. This flaw allows unauthorized users to cause a remote denial of service (DoS) attack.

Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.undertow:undertow-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.21.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.undertow:undertow-core"
      },
      "versions": [
        "2.4.0.Alpha1"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-3884"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-21T21:20:42Z",
    "nvd_published_at": "2025-12-03T19:15:54Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in Undertow that can cause remote denial of service attacks. When the server uses the FormEncodedDataDefinition.doParse(StreamSourceChannel) method to parse large form data encoding with application/x-www-form-urlencoded, the method will cause an OutOfMemory issue. This flaw allows unauthorized users to cause a remote denial of service (DoS) attack.",
  "id": "GHSA-6h4f-pj3g-q8fq",
  "modified": "2026-01-21T21:20:42Z",
  "published": "2025-12-03T21:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-3884"
    },
    {
      "type": "WEB",
      "url": "https://github.com/undertow-io/undertow/pull/1856"
    },
    {
      "type": "WEB",
      "url": "https://github.com/undertow-io/undertow/pull/1860"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:22773"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:22775"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:22777"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:3990"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:3992"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:0383"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:0384"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:0386"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2024-3884"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2275287"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/undertow-io/undertow"
    },
    {
      "type": "WEB",
      "url": "https://github.com/undertow-io/undertow/releases/tag/2.3.21.Final"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Undertow OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded"
}


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