CVE-2026-84714: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-8ghh-482v-94qp
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CVSS 7.1
CWE-184
Published
Advisory Summary

CVE-2026-84714 is a HIGH (CVSS 7.1) security vulnerability vulnerability (CWE-184: Incomplete List of Disallowed Inputs) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-84714 at a Glance

CVE Identifier CVE-2026-84714
GHSA Identifier GHSA-8ghh-482v-94qp
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-184: Incomplete List of Disallowed Inputs
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.1

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:H/I:L/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 High (C:H)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-84714

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-2026-84714, 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-184: Incomplete List of Disallowed Inputs, where the product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete. 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 input-validation guard sanitize_jinja(). The function uses two regular expressions to reject user-supplied Jinja, but the patterns stop at the first interior '}' or '%' character, so a Jinja expression containing an inner brace (for example an empty dict) is accepted while remaining valid Jinja. Because sanitize_jinja() is the sole guard on several launch-time fields — ad-hoc command module_args, Machine-credential username / become_method / become_user, and inventory host names — a low-privileged user can inject Jinja that ansible-core evaluates in the execution environment. This enables execution of arbitrary commands in the execution environment (bypassing an administrator's AD_HOC_COMMANDS module allowlist) and disclosure of secrets belonging to credentials the attacker cannot read (by templating a co-attached credential's injected environment variables), across the credential access-control boundary.

References

NVD — CVE-2026-84714 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84714
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-2026-84714
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2527198

Frequently Asked Questions

What is CVE-2026-84714?
CVE-2026-84714 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-184: Incomplete List of Disallowed Inputs.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-84714?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-84714?
CVE-2026-84714 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.
What CWE is associated with CVE-2026-84714?
CVE-2026-84714 is classified under CWE-184: Incomplete List of Disallowed Inputs (The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.).
How can I check Maven dependencies for CVE-2026-84714?
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 
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  "id" : "GHSA-8ghh-482v-94qp",
  "modified" : "2026-09-24T06:31:14Z",
  "published" : "2026-09-23T21:30:57Z",
  "aliases" : [ "CVE-2026-84714" ],
  "details" : "A flaw was found in the automation-controller input-validation\n                  guard sanitize_jinja(). The function uses two regular\n                  expressions to reject user-supplied Jinja, but the patterns\n                  stop at the first interior '}' or '%' character, so a Jinja\n                  expression containing an inner brace (for example an empty\n                  dict) is accepted while remaining valid Jinja. Because\n                  sanitize_jinja() is the sole guard on several launch-time\n                  fields — ad-hoc command module_args, Machine-credential\n                  username / become_method / become_user, and inventory host\n                  names — a low-privileged user can inject Jinja that ansible-core\n                  evaluates in the execution environment. This enables execution\n                  of arbitrary commands in the execution environment (bypassing an\n                  administrator's AD_HOC_COMMANDS module allowlist) and disclosure\n                  of secrets belonging to credentials the attacker cannot read\n                  (by templating a co-attached credential's injected environment\n                  variables), across the credential access-control boundary.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
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  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:71113"
  }, {
    "type" : "WEB",
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  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:71177"
  }, {
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  } ],
  "database_specific" : {
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    "github_reviewed" : false,
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    "nvd_published_at" : "2026-09-23T20:17:18Z"
  }
}