CVE-2026-58218: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-qcxx-8h4x-9v7w
Share
CVSS 5.3
CWE-410
Published
Advisory Summary

CVE-2026-58218 is a MODERATE (CVSS 5.3) security vulnerability vulnerability (CWE-410: Insufficient Resource Pool) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product's resource pool is not large enough to handle peak demand, which allows an attacker to prevent others from accessing the resource by using a (relatively) large number of requests for resources.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-58218 at a Glance

CVE Identifier CVE-2026-58218
GHSA Identifier GHSA-qcxx-8h4x-9v7w
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-410: Insufficient Resource Pool
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

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).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-58218

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.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-58218, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze 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-410: Insufficient Resource Pool, where the product's resource pool is not large enough to handle peak demand, which allows an attacker to prevent others from accessing the resource by using a (relatively) large number of requests for resources. 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

A flaw was found in Samba's internal DNS server where unauthenticated TKEY registration requests were added to the TKEY name cache before being rejected. A remote, unauthenticated attacker can exploit this behavior by sending a large number of TKEY requests with arbitrary names, exhausting the cache and evicting legitimate TKEY entries. This can prevent legitimate TSIG authentication for signed DNS queries, resulting in a denial of service.

References

NVD — CVE-2026-58218 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-58218
Software Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-58218
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2502728
bugzilla.samba.org/show_bug.cgi WEB
https://bugzilla.samba.org/show_bug.cgi?id=16115
Software Security Information SECURITY
https://www.samba.org/samba/security/CVE-2026-58218.html

Frequently Asked Questions

What is CVE-2026-58218?
CVE-2026-58218 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-410: Insufficient Resource Pool.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-58218?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-58218?
CVE-2026-58218 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2026-58218?
CVE-2026-58218 is classified under CWE-410: Insufficient Resource Pool (The product's resource pool is not large enough to handle peak demand, which allows an attacker to prevent others from accessing the resource by using a (relatively) large number of requests for resources.).
How can I check Maven dependencies for CVE-2026-58218?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qcxx-8h4x-9v7w",
  "modified" : "2026-07-30T15:31:51Z",
  "published" : "2026-07-30T15:31:51Z",
  "aliases" : [ "CVE-2026-58218" ],
  "details" : "A flaw was found in Samba's internal DNS server where unauthenticated TKEY registration requests were added to the TKEY name cache before being rejected. A remote, unauthenticated attacker can exploit this behavior by sending a large number of TKEY requests with arbitrary names, exhausting the cache and evicting legitimate TKEY entries. This can prevent legitimate TSIG authentication for signed DNS queries, resulting in a denial of service.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-58218"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-58218"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2502728"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.samba.org/show_bug.cgi?id=16115"
  }, {
    "type" : "WEB",
    "url" : "https://www.samba.org/samba/security/CVE-2026-58218.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-410" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-30T14:17:00Z"
  }
}