GHSA-33HJ-RCMX-86MV

Vulnerability from github – Published: 2026-01-30 15:31 – Updated: 2026-02-01 18:07
VLAI?
Summary
Undertow Servlets Vulnerable to Remote DoS via OutOfMemoryError when Passed Large Parameter Names
Details

A flaw was found in Undertow. Servlets using a method that calls HttpServletRequestImpl.getParameterNames() can cause an OutOfMemoryError when the client sends a request with large parameter names. This issue can be exploited by an unauthorized user 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"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-4027"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-01T18:07:04Z",
    "nvd_published_at": "2026-01-30T15:16:07Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in Undertow. Servlets using a method that calls HttpServletRequestImpl.getParameterNames() can cause an OutOfMemoryError when the client sends a request with large parameter names. This issue can be exploited by an unauthorized user to cause a remote denial-of-service (DoS) attack.",
  "id": "GHSA-33hj-rcmx-86mv",
  "modified": "2026-02-01T18:07:04Z",
  "published": "2026-01-30T15:31:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-4027"
    },
    {
      "type": "WEB",
      "url": "https://github.com/undertow-io/undertow/commit/6b7c18481ce65ae4012d92fe2b7f17a21ef4d70b"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2024-4027"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2276410"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/undertow-io/undertow"
    },
    {
      "type": "WEB",
      "url": "https://github.com/undertow-io/undertow/releases/tag/2.3.21.Final"
    },
    {
      "type": "WEB",
      "url": "https://issues.redhat.com/browse/UNDERTOW-2377"
    }
  ],
  "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 Servlets Vulnerable to Remote DoS via OutOfMemoryError when Passed Large Parameter Names"
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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