# CVE-2026-82189: Missing authorization in J2Store extension for Joomla

> Unauthenticated attackers can mark any order as failed, disrupting revenue and causing operational confusion in J2Store.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Sep 2026
- **Updated:** 16 Sep 2026
- **Also known as:** GHSA-739c-vch3-5f25

## What is CVE-2026-82189?

CVE-2026-82189 is a high-severity missing authorization vulnerability in j2commerce.com J2Store extension for Joomla, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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.

Weakness: CWE-602 (Client-Side Enforcement of Server-Side Security), CWE-472 (External Control of Assumed-Immutable Web Parameter)

## Which versions are affected by CVE-2026-82189?


## How do I fix CVE-2026-82189?

No fix has been published for CVE-2026-82189 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-82189 being exploited?

There is no known exploitation of CVE-2026-82189 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-82189 and fix it if it is affected.

What it is: CVE-2026-82189 is a high-severity missing authorization vulnerability in j2commerce.com J2Store extension for Joomla, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-82189 in the wild and no public exploit code.

Affected product: j2commerce.com J2Store extension for Joomla. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-82189/ (Markdown: https://insights.sbomify.com/CVE-2026-82189/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-82189
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-82189
- OSV: https://osv.dev/vulnerability/CVE-2026-82189

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-82189/
Summaries are generated and may contain mistakes; the official description above is the record.