CVE-2026-82191: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-hv62-7458-mg3v
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CWE-1241
Published
Advisory Summary

CVE-2026-82191 is a MODERATE security vulnerability vulnerability (CWE-1241: Use of Predictable Algorithm in Random Number Generator) affecting Software libraries in the Maven ecosystem. The weakness occurs when the device uses an algorithm that is predictable and generates a pseudo-random number.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-82191 at a Glance

CVE Identifier CVE-2026-82191
GHSA Identifier GHSA-hv62-7458-mg3v
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-1241: Use of Predictable Algorithm in Random Number Generator
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-82191

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-2026-82191, 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-1241: Use of Predictable Algorithm in Random Number Generator, where the device uses an algorithm that is predictable and generates a pseudo-random number. 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

Joomla Extension - j2commerce.com - Unescaped request data reflected into PayPal notify redirect in J2Store 1.0.0-3.3.2, 4.0.0-4.0.22, 4.1.0-4.1.7 - A crafted link to the paypal notify endpoint, if followed by a victim's browser (or an automated system that fetches it), causes the resulting redirect to `com_j2store`'s checkout controller to carry attacker-chosen query parameters instead of only the intended `view=checkout&task=confirmPayment&orderpayment_type=...&paction=process` set — parameter injection/smuggling into that follow-up request. This requires a victim to load the crafted link (`UI:R`/`UI:P`); it does not by itself grant an unauthenticated attacker anything they could not already obtain by requesting the target `com_j2store` URL directly with their own parameters.

References

NVD — CVE-2026-82191 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82191
www.j2commerce.com WEB
https://www.j2commerce.com

Frequently Asked Questions

What is CVE-2026-82191?
CVE-2026-82191 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-1241: Use of Predictable Algorithm in Random Number Generator.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-82191?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-82191?
CVE-2026-82191 is classified under CWE-1241: Use of Predictable Algorithm in Random Number Generator (The device uses an algorithm that is predictable and generates a pseudo-random number.).
How can I check Maven dependencies for CVE-2026-82191?
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-hv62-7458-mg3v",
  "modified" : "2026-09-15T21:31:24Z",
  "published" : "2026-09-15T21:31:24Z",
  "aliases" : [ "CVE-2026-82191" ],
  "details" : "Joomla Extension - j2commerce.com - Unescaped request data reflected into PayPal notify redirect in J2Store 1.0.0-3.3.2, 4.0.0-4.0.22, 4.1.0-4.1.7 - A crafted link to the paypal notify endpoint, if followed by a victim's browser (or an automated system that fetches it), causes the resulting redirect to `com_j2store`'s checkout controller to carry attacker-chosen query parameters instead of only the intended `view=checkout&task=confirmPayment&orderpayment_type=...&paction=process` set — parameter injection/smuggling into that follow-up request. This requires a victim to load the crafted link (`UI:R`/`UI:P`); it does not by itself grant an unauthenticated attacker anything they could not already obtain by requesting the target `com_j2store` URL directly with their own parameters.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/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-2026-82191"
  }, {
    "type" : "WEB",
    "url" : "https://www.j2commerce.com"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1241" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-15T19:17:42Z"
  }
}