PT-2026-5402 · Undertow · Undertow

Published 2024-01-01 · Updated 2026-02-28 · CVE-2024-4027

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Undertow (affected versions not specified)

Description A flaw exists in Undertow where servlets utilizing a method that calls HttpServletRequestImpl.getParameterNames() may experience an OutOfMemoryError when handling client requests with excessively large parameter names. This condition can be leveraged by an unauthorized attacker to initiate a remote denial-of-service (DoS) attack. The vulnerable function is getParameterNames().

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Allocation of Resources Without Limits

Weakness Enumeration

CWE-20

CWE-770

Related Identifiers

CVE-2024-4027

GHSA-33HJ-RCMX-86MV

OESA-2026-1431

Affected Products

Undertow

References · 27

• https://security-tracker.debian.org/tracker/CVE-2024-4027 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2024-4027 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-3884 · Security Note
• https://osv.dev/vulnerability/OESA-2026-1431 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-33hj-rcmx-86mv · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2024-4027 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-4027 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2024-4027 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-4027 · Vendor Advisory
• https://github.com/undertow-io/undertow/releases/tag/2.2.39.Final · Note
• https://github.com/undertow-io/undertow/commit/cb854c779b9e2368c3c274ebd7217c8e75d505be · Note
• https://github.com/undertow-io/undertow/commit/8318dd36fdc2c9842baf10c5f1bfbb3bc23f75e7 · Note
• https://github.com/undertow-io/undertow/commit/fb14baa51b611a4a9f755f1d8b07d6e12eac68e3 · Note
• https://github.com/undertow-io/undertow/releases/tag/2.3.21.Final · Note
• https://github.com/undertow-io/undertow/commit/6b7c18481ce65ae4012d92fe2b7f17a21ef4d70b · Note