CVE-2026-44390: Software Security Vulnerability Vulnerability
MODERATECVE-2026-44390 is a MODERATE (CVSS 5.3) security vulnerability vulnerability (CWE-1050: Excessive Platform Resource Consumption within a Loop) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product has a loop body or loop condition that contains a control element that directly or indirectly consumes platform resources, e.g. messaging, sessions, locks, or file descriptors.. Remediation is available in the latest vendor maintenance releases.
CVE-2026-44390 at a Glance
Security Impact
CVSS: 5.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).
How to Fix CVE-2026-44390
To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:treeHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-44390, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:treeAnalyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.
Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-1050: Excessive Platform Resource Consumption within a Loop, where the product has a loop body or loop condition that contains a control element that directly or indirectly consumes platform resources, e.g. messaging, sessions, locks, or file descriptors. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
References
Frequently Asked Questions
What is CVE-2026-44390?
Which Software versions are affected?
What version fixes CVE-2026-44390?
What is the CVSS score of CVE-2026-44390?
What CWE is associated with CVE-2026-44390?
How can I check Maven dependencies for CVE-2026-44390?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-6522-r5fq-99gw",
"modified" : "2026-07-29T15:30:48Z",
"published" : "2026-05-20T12:30:37Z",
"aliases" : [ "CVE-2026-44390" ],
"details" : "NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability when handling replies with very large RRsets that Unbound needs to perform name compression for. Malicious upstream responses with very large RRsets with records that don't share a suffix above the root can cause Unbound to spend a considerable time applying name compression to downstream replies. This can lead to degraded performance and eventually denial of service in well orchestrated attacks. An adversary can exploit the vulnerability by querying Unbound for the specially crafted contents of a malicious zone with very large RRsets. Before Unbound replies to the query it will try to apply name compression which was an unbounded operation that could lock the CPU until the whole packet was complete. A compression limit was introduced in 1.21.1 for this but it didn't account for the case where records would not share any suffix above the root. That causes Unbound to go in a different code path because of the compression tree lookup failure and eventually not increment the compression counter for those operations. Unbound 1.25.1 contains a patch with a fix that increments the compression counter regardless of the compression tree lookup. This is a complement fix to CVE-2024-8508.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
}, {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber"
} ],
"affected" : [ ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-44390"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2026:24013"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2026:36320"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2026:36777"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2026:37282"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/security/cve/CVE-2026-44390"
}, {
"type" : "WEB",
"url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2480130"
}, {
"type" : "WEB",
"url" : "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44390.json"
}, {
"type" : "WEB",
"url" : "https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-44390.txt"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-1050", "CWE-407" ],
"severity" : "MODERATE",
"github_reviewed" : false,
"github_reviewed_at" : null,
"nvd_published_at" : "2026-05-20T10:16:28Z"
}
}