CVE-2026-78416: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-4ghj-75g5-h9pf
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CWE-915
Published
Advisory Summary

CVE-2026-78416 is a HIGH security vulnerability vulnerability (CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-78416 at a Glance

CVE Identifier CVE-2026-78416
GHSA Identifier GHSA-4ghj-75g5-h9pf
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-78416

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-2026-78416, 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-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes, where the product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified. 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

Craft CMS versions from 4.0.0-RC1 before 4.18.2 and from 5.0.0-RC1 before 5.10.6 contain an authenticated remote code execution vulnerability in control panel element-search condition handling. A JSON cleanse bypass in condition.config allows Yii behavior/event configuration keys to be interpreted after decoding, enabling command execution as the PHP/web user.

References

NVD — CVE-2026-78416 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78416
Software Source Repository REPOSITORY
https://github.com/craftcms/cms
Software Release RELEASE
https://github.com/craftcms/cms/releases/tag/5.10.6
www.hckrt.com/hacktivity/hckrt-jd... WEB
https://www.hckrt.com/hacktivity/HCKRT-JD662P

Frequently Asked Questions

What is CVE-2026-78416?
CVE-2026-78416 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-78416?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-78416?
CVE-2026-78416 is classified under CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes (The product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified.).
How can I check Maven dependencies for CVE-2026-78416?
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-4ghj-75g5-h9pf",
  "modified" : "2026-08-27T00:30:28Z",
  "published" : "2026-08-24T18:31:51Z",
  "aliases" : [ "CVE-2026-78416" ],
  "details" : "Craft CMS versions from 4.0.0-RC1 before 4.18.2 and from 5.0.0-RC1 before 5.10.6 contain an authenticated remote code execution vulnerability in control panel element-search condition handling. A JSON cleanse bypass in condition.config allows Yii behavior/event configuration keys to be interpreted after decoding, enabling command execution as the PHP/web user.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-78416"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/releases/tag/5.10.6"
  }, {
    "type" : "WEB",
    "url" : "https://www.hckrt.com/hacktivity/HCKRT-JD662P"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-915" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-24T16:17:24Z"
  }
}