CVE-2024-4027
HIGH7.5EPSS 0.38%Undertow Servlets Vulnerable to Remote DoS via OutOfMemoryError when Passed Large Parameter Names
Published: 1/30/2026Modified: 4/28/2026
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.
Affected packages (2)
- Debian/undertowfrom 0
- Maven/io.undertow:undertow-corefrom 0, < 2.2.39.Final
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (16)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2024-4027
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2024-4027
- PATCHhttps://github.com/undertow-io/undertow
- WEBhttps://access.redhat.com/security/cve/CVE-2024-4027
- WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=2276410
- WEBhttps://github.com/undertow-io/undertow/commit/6b7c18481ce65ae4012d92fe2b7f17a21ef4d70b
- WEBhttps://github.com/undertow-io/undertow/commit/8318dd36fdc2c9842baf10c5f1bfbb3bc23f75e7
- WEBhttps://github.com/undertow-io/undertow/commit/cb854c779b9e2368c3c274ebd7217c8e75d505be
- WEBhttps://github.com/undertow-io/undertow/commit/fb14baa51b611a4a9f755f1d8b07d6e12eac68e3
- WEBhttps://github.com/undertow-io/undertow/pull/1860
- WEBhttps://github.com/undertow-io/undertow/pull/1882
- WEBhttps://github.com/undertow-io/undertow/pull/1894
- WEBhttps://github.com/undertow-io/undertow/releases/tag/2.2.39.Final
- WEBhttps://github.com/undertow-io/undertow/releases/tag/2.3.21.Final
- WEBhttps://github.com/undertow-io/undertow/releases/tag/2.4.0.Beta1
- WEBhttps://issues.redhat.com/browse/UNDERTOW-2377