High severity7.5NVD Advisory· Published Jan 30, 2026· Updated Apr 15, 2026
CVE-2024-4027
CVE-2024-4027
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
io.undertow:undertow-coreMaven | < 2.2.39.Final | 2.2.39.Final |
io.undertow:undertow-coreMaven | >= 2.4.0.Alpha1, < 2.4.0.Beta1 | 2.4.0.Beta1 |
io.undertow:undertow-coreMaven | >= 2.3.0.Alpha1, < 2.3.21.Final | 2.3.21.Final |
Affected products
1Patches
Vulnerability mechanics
References
15- github.com/advisories/GHSA-33hj-rcmx-86mvghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2024-4027ghsaADVISORY
- access.redhat.com/security/cve/CVE-2024-4027nvdWEB
- bugzilla.redhat.com/show_bug.cginvdWEB
- github.com/undertow-io/undertow/commit/6b7c18481ce65ae4012d92fe2b7f17a21ef4d70bghsaWEB
- github.com/undertow-io/undertow/commit/8318dd36fdc2c9842baf10c5f1bfbb3bc23f75e7ghsaWEB
- github.com/undertow-io/undertow/commit/cb854c779b9e2368c3c274ebd7217c8e75d505beghsaWEB
- github.com/undertow-io/undertow/commit/fb14baa51b611a4a9f755f1d8b07d6e12eac68e3ghsaWEB
- github.com/undertow-io/undertow/pull/1860ghsaWEB
- github.com/undertow-io/undertow/pull/1882ghsaWEB
- github.com/undertow-io/undertow/pull/1894ghsaWEB
- github.com/undertow-io/undertow/releases/tag/2.2.39.FinalghsaWEB
- github.com/undertow-io/undertow/releases/tag/2.3.21.FinalghsaWEB
- github.com/undertow-io/undertow/releases/tag/2.4.0.Beta1ghsaWEB
- issues.redhat.com/browse/UNDERTOW-2377ghsaWEB
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