CVE-2026-84716: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-hcpg-prc4-w26w
Share
CVSS 6.6
CWE-266
Published
Advisory Summary

CVE-2026-84716 is a MODERATE (CVSS 6.6) security vulnerability vulnerability (CWE-266: Incorrect Privilege Assignment) affecting Software libraries in the Maven ecosystem. The weakness occurs when a product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-84716 at a Glance

CVE Identifier CVE-2026-84716
GHSA Identifier GHSA-hcpg-prc4-w26w
Severity MODERATE
CVSS v3.1 Base Score 6.6
CWE Classification CWE-266: Incorrect Privilege Assignment
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.6

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

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

How to Fix CVE-2026-84716

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-2026-84716, 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-266: Incorrect Privilege Assignment, where a product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor. 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 the automation-controller instance install-bundle endpoint. When a System Administrator downloads an execution/hop node's install bundle, the controller signs an X.509 certificate with the receptor mesh certificate authority in which the Common Name, DNS subject-alternative-name, and receptor node-id are taken verbatim from the caller-chosen instance hostname, with a hard-coded ten-year validity, a random serial, and no issuance log or revocation list. Because the hostname charset validator is case-insensitive while the uniqueness validator is case-sensitive, an administrator can register a case variant of an existing control node's hostname and obtain a mesh-CA-signed certificate that TLS peers, which match hostnames case-insensitively, accept as that control node. In managed/hosted deployments — where the customer holds controller superuser but the platform operator runs the mesh — this yields a long-lived, non-revocable mesh peer credential and, with an on-path position, TLS impersonation or interception of control/hybrid mesh nodes. It does not grant direct remote code execution, because receptor work submission is gated by a separate signing key not included in the bundle.

References

NVD — CVE-2026-84716 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84716
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71113
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71114
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71177
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71179
Software Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-84716
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2527199

Frequently Asked Questions

What is CVE-2026-84716?
CVE-2026-84716 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-266: Incorrect Privilege Assignment.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-84716?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-84716?
CVE-2026-84716 has a CVSS v3.1 base score of 6.6 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N.
What CWE is associated with CVE-2026-84716?
CVE-2026-84716 is classified under CWE-266: Incorrect Privilege Assignment (A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.).
How can I check Maven dependencies for CVE-2026-84716?
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-hcpg-prc4-w26w",
  "modified" : "2026-09-24T09:31:50Z",
  "published" : "2026-09-23T21:30:58Z",
  "aliases" : [ "CVE-2026-84716" ],
  "details" : "A flaw was found in the automation-controller instance\n                  install-bundle endpoint. When a System Administrator downloads\n                  an execution/hop node's install bundle, the controller signs an\n                  X.509 certificate with the receptor mesh certificate authority\n                  in which the Common Name, DNS subject-alternative-name, and\n                  receptor node-id are taken verbatim from the caller-chosen\n                  instance hostname, with a hard-coded ten-year validity, a random\n                  serial, and no issuance log or revocation list. Because the\n                  hostname charset validator is case-insensitive while the\n                  uniqueness validator is case-sensitive, an administrator can\n                  register a case variant of an existing control node's hostname\n                  and obtain a mesh-CA-signed certificate that TLS peers, which\n                  match hostnames case-insensitively, accept as that control node.\n                  In managed/hosted deployments — where the customer holds\n                  controller superuser but the platform operator runs the mesh —\n                  this yields a long-lived, non-revocable mesh peer credential and,\n                  with an on-path position, TLS impersonation or interception of\n                  control/hybrid mesh nodes. It does not grant direct remote code\n                  execution, because receptor work submission is gated by a\n                  separate signing key not included in the bundle.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-84716"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:71113"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:71114"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:71177"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:71179"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-84716"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2527199"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-266" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-23T20:17:18Z"
  }
}