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Undertow: outofmemoryerror due to @multipartconfig handling

Type: advisorySources: OSV

A flaw was found in undertow. Servlets annotated with @MultipartConfig may cause an OutOfMemoryError due to large multipart content. This may allow unauthorized users to cause remote Denial of Service (DoS) attack. If the server uses fileSizeThreshold to limit the file size, it's possible to bypass the limit by setting the file name in the request to null.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2023-3223
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 13:23 UTC · Revision 1

Source evidence

Undertow: outofmemoryerror due to @multipartconfig handling

core-osv · Original source

Published 27 Sept 2023, 13:54 UTC

A flaw was found in undertow. Servlets annotated with @MultipartConfig may cause an OutOfMemoryError due to large multipart content. This may allow unauthorized users to cause remote Denial of Service (DoS) attack. If the server uses fileSizeThreshold to limit the file size, it's possible to bypass the limit by setting the file name in the request to null.

osv:CVE-2023-3223
Complete source record
{
  "id": "405a290f7df6424fe148afcb8b85ad4b830549b6bf828380581d1498bcaf7649",
  "url": "https://osv.dev/vulnerability/CVE-2023-3223",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Undertow: outofmemoryerror due to @multipartconfig handling",
    "summary": "A flaw was found in undertow. Servlets annotated with @MultipartConfig may cause an OutOfMemoryError due to large multipart content. This may allow unauthorized users to cause remote Denial of Service (DoS) attack. If the server uses fileSizeThreshold to limit the file size, it's possible to bypass the limit by setting the file name in the request to null.",
    "evidence": "osv:CVE-2023-3223",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-3223",
      "aliases": [
        "CVE-2023-3223",
        "GHSA-65h2-wf7m-q2v8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/undertow-io/undertow",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
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                {
                  "fixed": "1c15c29da4800be3189ac6dddb115d89ab27de24"
                }
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              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*",
                    "range": [
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                    "source": "CPE_RANGE"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-3223.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.607503776Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/downloads/content/package-browser/",
        "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
        "https://catalog.redhat.com/software/containers/",
        "https://access.redhat.com/errata/RHSA-2023:4505",
        "https://access.redhat.com/errata/RHSA-2023:4506",
        "https://access.redhat.com/errata/RHSA-2023:4507",
        "https://access.redhat.com/errata/RHSA-2023:4509",
        "https://access.redhat.com/errata/RHSA-2023:4918",
        "https://access.redhat.com/errata/RHSA-2023:4919",
        "https://access.redhat.com/errata/RHSA-2023:4920",
        "https://access.redhat.com/errata/RHSA-2023:4921",
        "https://access.redhat.com/errata/RHSA-2023:4924",
        "https://access.redhat.com/errata/RHSA-2023:7247",
        "https://access.redhat.com/security/cve/CVE-2023-3223",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3223.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-3223",
        "https://security.netapp.com/advisory/ntap-20231027-0004/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2209689"
      ],
      "provider_metadata": {
        "cwe_ids": [
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        "cna_assigner": "redhat",
        "unresolved_ranges": [
          {
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              {
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                  {
                    "fixed": "7.6-27"
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                ],
                "source": "AFFECTED_FIELD",
                "strategy": "InverseAffectedRanges"
              }
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        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3223.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-3223",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503021,
  "published_at": "2023-09-27T13:54:44.682+00:00"
}