How many CVEs have patched NetworkUtils?

2 published CVEs changed NetworkUtils in undertow-io/undertow, in 2 distinct patches totalling 90 changed lines, between 2025 and 2026.

What is the latest CVE that changed NetworkUtils?

CVE-2024-4027 (Undertow: outofmemoryerror in httpservletrequestimpl.getparameternames() can cause remote dos attacks), published 2026-01-30, changed lines 36 to 75 of core/src/main/java/io/undertow/util/NetworkUtils.java.

How does NetworkUtils compare to the rest of undertow-io/undertow?

undertow-io/undertow has 22 CVEs with a located fix in total; 2 of them changed NetworkUtils.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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Patched Functions
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Undertow
NetworkUtils

NetworkUtils in undertow-io/undertow: Patched by 2 CVEs

undertow-io/undertow

Class

NetworkUtils

Name: NetworkUtils in undertow-io/undertow: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

core/src/main/java/io/undertow/util/NetworkUtils.java

Last patched January 30, 2026

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2025–2026

Years

By CVE publication date

Overview

NetworkUtils in undertow-io/undertow was changed by 2 published CVE fixes between 2025 and 2026, in 2 distinct patches that added or removed 90 lines in total.

undertow-io/undertow has 22 CVEs with a located fix in total, so 9% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed NetworkUtils, newest first, with the lines each fix touched.

Undertow: outofmemoryerror in httpservletrequestimpl.getparameternames() can cause remote dos attacks
CVE-2024-4027 · lines 36–75 · +31 −14
High · CVSS 7.5
EPSS 0.4%2026-01-30
Undertow: outofmemory when parsing form data encoding with application/x-www-form-urlencoded
CVE-2024-3884 · lines 36–75 · +31 −14
High · CVSS 7.5
EPSS 1.4%2025-12-03

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Other hotspots in the repository

Functions in undertow-io/undertow changed by the most CVE fixes.

handleEventWithNoRunningRequest4 CVEs · core/src/main/java/io/undertow/server/protocol/http/HttpReadListener.java encode3 CVEs · core/src/main/java/io/undertow/protocols/http2/HpackEncoder.java parse3 CVEs · core/src/main/java/io/undertow/server/protocol/ajp/AjpRequestParser.java handlePath3 CVEs · core/src/main/java/io/undertow/server/protocol/http/HttpRequestParser.java handleEvent3 CVEs · core/src/main/java/io/undertow/server/protocol/ajp/AjpReadListener.java handleDigestHeader3 CVEs · core/src/main/java/io/undertow/security/impl/DigestAuthenticationMechanism.java

All patched functions in undertow-io/undertow

Frequently asked questions

Common questions about CVE fixes to NetworkUtils.

How many CVEs have patched NetworkUtils?: 2 published CVEs changed NetworkUtils in undertow-io/undertow, in 2 distinct patches totalling 90 changed lines, between 2025 and 2026.
What is the latest CVE that changed NetworkUtils?: CVE-2024-4027 (Undertow: outofmemoryerror in httpservletrequestimpl.getparameternames() can cause remote dos attacks), published 2026-01-30, changed lines 36 to 75 of core/src/main/java/io/undertow/util/NetworkUtils.java.
How does NetworkUtils compare to the rest of undertow-io/undertow?: undertow-io/undertow has 22 CVEs with a located fix in total; 2 of them changed NetworkUtils.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

core/src/main/java/io/undertow/util/NetworkUtils.java on GitHub (opens in a new tab)
All patched functions in undertow-io/undertow
Patched functions directory

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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