# CVE-2026-67358: Joomla Extension - j2commerce.com - Download quota manipulation in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5

> Authenticated users can manipulate download quotas for other orders and bypass CSRF protections in the J2Store Joomla extension.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Aug 2026
- **Updated:** 21 Aug 2026
- **Also known as:** GHSA-mrf5-4pj3-6jvf

## What is CVE-2026-67358?

CVE-2026-67358 is a medium-severity vulnerability in j2commerce.com J2Store extension for Joomla, published on 21 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Joomla Extension - j2commerce.com - Download quota manipulation in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5 - An authenticated user with a valid order token could increment the download limit counter on a download record belonging to a different order. The endpoint also lacked a CSRF token.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2026-67358?


## How do I fix CVE-2026-67358?

No fix has been published for CVE-2026-67358 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-67358 being exploited?

There is no known exploitation of CVE-2026-67358 in the wild and no public exploit code.

Public exploit code:

- PoC for J2Store CVE-2026-67358–67362 (J2Commerce security advisory Aug 2026) (github_poc): https://github.com/murrez/CVE-J2store-2026

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-67358 and fix it if it is affected.

What it is: CVE-2026-67358 is a medium-severity vulnerability in j2commerce.com J2Store extension for Joomla, published on 21 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-67358 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-2026-67358/ (Markdown: https://insights.sbomify.com/CVE-2026-67358/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-67358
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-67358
- OSV: https://osv.dev/vulnerability/CVE-2026-67358

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-67358/
Summaries are generated and may contain mistakes; the official description above is the record.