CVE-2026-20265: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-6q6w-qw52-9q3j
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CVSS 4.3
CWE-1188
Published
Advisory Summary

CVE-2026-20265 is a MODERATE (CVSS 4.3) security vulnerability vulnerability (CWE-1188: Initialization of a Resource with an Insecure Default) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-20265 at a Glance

CVE Identifier CVE-2026-20265
GHSA Identifier GHSA-6q6w-qw52-9q3j
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-1188: Initialization of a Resource with an Insecure Default
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).

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

How to Fix CVE-2026-20265

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-2026-20265, 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-1188: Initialization of a Resource with an Insecure Default, where the product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure. 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

In Splunk AI Toolkit versions below 5.7.4, a low-privileged user that does not hold the "admin" or "power" Splunk roles could cause the Splunk AI Toolkit to make outbound requests over HTTP to a server that an attacker controls, which could allow for data exfiltration. The vulnerability exists because of an insecure default domain allowlist in the Splunk AI Toolkit, which does not restrict outbound AI agent requests to approved external domains.

References

NVD — CVE-2026-20265 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20265
advisory.splunk.com/advisories/svd-2026... WEB
https://advisory.splunk.com/advisories/SVD-2026-0613

Frequently Asked Questions

What is CVE-2026-20265?
CVE-2026-20265 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-1188: Initialization of a Resource with an Insecure Default.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-20265?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-20265?
CVE-2026-20265 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-20265?
CVE-2026-20265 is classified under CWE-1188: Initialization of a Resource with an Insecure Default (The product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure.).
How can I check Maven dependencies for CVE-2026-20265?
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-6q6w-qw52-9q3j",
  "modified" : "2026-06-17T18:35:57Z",
  "published" : "2026-06-17T18:35:57Z",
  "aliases" : [ "CVE-2026-20265" ],
  "details" : "In Splunk AI Toolkit versions below 5.7.4, a low-privileged user that does not hold the \"admin\" or \"power\" Splunk roles could cause the Splunk AI Toolkit to make outbound requests over HTTP to a server that an attacker controls, which could allow for data exfiltration.  \n\nThe vulnerability exists because of an insecure default domain allowlist in the Splunk AI Toolkit, which does not restrict outbound AI agent  requests to approved external domains.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-20265"
  }, {
    "type" : "WEB",
    "url" : "https://advisory.splunk.com/advisories/SVD-2026-0613"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1188" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-17T18:17:40Z"
  }
}