j2commerce J2Store Extension up to 1.0.0-3.3.2/4.0.0-4.0.22/4.1.0-4.1.7 Orders denial of service

Summaryinfo

A vulnerability classified as critical was found in j2commerce J2Store Extension up to 1.0.0-3.3.2/4.0.0-4.0.22/4.1.0-4.1.7. Affected by this vulnerability is an unknown functionality of the component Orders. Such manipulation leads to denial of service. This vulnerability is listed as CVE-2026-82189. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in j2commerce J2Store Extension up to 1.0.0-3.3.2/4.0.0-4.0.22/4.1.0-4.1.7. It has been rated as critical. Affected by this issue is an unknown function of the component Orders. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is integrity, and availability. CVE summarizes:

Joomla Extension - j2commerce.com - Any order can be marked Failed by anyone in J2Store 1.0.0-3.3.2, 4.0.0-4.0.22, 4.1.0-4.1.7 - Unauthenticated denial-of-service against the order pipeline: mass-failing pending orders to disrupt revenue and force manual reprocessing, or flipping already-fulfilled orders back to `FAILED` to cause operational confusion (unwarranted refunds/cancellations, customer-support load). Unlike the earlier confirmation-fraud issue, this required no correct payment amount or transaction data at all.

The advisory is available at j2commerce.com. This vulnerability is handled as CVE-2026-82189 since 08/28/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• j2commerce

Name

• J2Store Extension

Version

• 1.0.0-3.3.0
• 1.0.0-3.3.1
• 1.0.0-3.3.2
• 4.0.0-4.0.0
• 4.0.0-4.0.1
• 4.0.0-4.0.2
• 4.0.0-4.0.3
• 4.0.0-4.0.4
• 4.0.0-4.0.5
• 4.0.0-4.0.6
• 4.0.0-4.0.7
• 4.0.0-4.0.8
• 4.0.0-4.0.9
• 4.0.0-4.0.10
• 4.0.0-4.0.11
• 4.0.0-4.0.12
• 4.0.0-4.0.13
• 4.0.0-4.0.14
• 4.0.0-4.0.15
• 4.0.0-4.0.16
• 4.0.0-4.0.17
• 4.0.0-4.0.18
• 4.0.0-4.0.19
• 4.0.0-4.0.20
• 4.0.0-4.0.21
• 4.0.0-4.0.22
• 4.1.0-4.1.0
• 4.1.0-4.1.1
• 4.1.0-4.1.2
• 4.1.0-4.1.3
• 4.1.0-4.1.4
• 4.1.0-4.1.5
• 4.1.0-4.1.6
• 4.1.0-4.1.7

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