CVE-2026-71286: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-pvmf-8hpv-qh7r
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CVSS 6.1
CWE-1336
Published
Advisory Summary

CVE-2026-71286 is a MODERATE (CVSS 6.1) security vulnerability vulnerability (CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-71286 at a Glance

CVE Identifier CVE-2026-71286
GHSA Identifier GHSA-pvmf-8hpv-qh7r
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.1

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:R/S:C/C:L/I:L/A:N).

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

How to Fix CVE-2026-71286

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-2026-71286, 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-1336: Improper Neutralization of Special Elements Used in a Template Engine, where the product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. 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

The render-template component of ember-dynamic-render-template (addon/components/render-template.js) passes its `templateString` property directly into Ember/Glimmer's compileTemplate() (from @ember/template-compilation) with no sanitization, allow-listing, or validation of the input. Because compileTemplate() dynamically compiles and renders the supplied string as a live Handlebars/Glimmer template, any application that renders attacker-influenced data through this component's templateString property is exposed to client-side template injection: an attacker-controlled Handlebars expression is compiled and executed in the context of the rendering component, which can be leveraged for cross-site scripting depending on what helpers/context are exposed to the compiled template.

References

NVD — CVE-2026-71286 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-71286
Software Source Repository REPOSITORY
https://github.com/miguelcobain/ember-dynamic-render-template
Software Source Repository REPOSITORY
https://github.com/miguelcobain/ember-dynamic-render-template/blob/master/addon/components/render-template.js

Frequently Asked Questions

What is CVE-2026-71286?
CVE-2026-71286 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-71286?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-71286?
CVE-2026-71286 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-71286?
CVE-2026-71286 is classified under CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine (The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.).
How can I check Maven dependencies for CVE-2026-71286?
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-pvmf-8hpv-qh7r",
  "modified" : "2026-08-05T15:32:21Z",
  "published" : "2026-08-05T15:32:21Z",
  "aliases" : [ "CVE-2026-71286" ],
  "details" : "The render-template component of ember-dynamic-render-template (addon/components/render-template.js) passes its `templateString` property directly into Ember/Glimmer's compileTemplate() (from @ember/template-compilation) with no sanitization, allow-listing, or validation of the input. Because compileTemplate() dynamically compiles and renders the supplied string as a live Handlebars/Glimmer template, any application that renders attacker-influenced data through this component's templateString property is exposed to client-side template injection: an attacker-controlled Handlebars expression is compiled and executed in the context of the rendering component, which can be leveraged for cross-site scripting depending on what helpers/context are exposed to the compiled template.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-71286"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/miguelcobain/ember-dynamic-render-template"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/miguelcobain/ember-dynamic-render-template/blob/master/addon/components/render-template.js"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1336" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-05T13:24:53Z"
  }
}