# CVE-2026-102784: Joomla Extension - balbooa.com - CSRF in language installation feature Gridbox < 2.20.4.0

> Attackers can force privileged users to install malicious language files via CSRF in the Gridbox Joomla extension.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Oct 2026
- **Updated:** 9 Oct 2026
- **Also known as:** GHSA-j9q5-m57g-9vj5

## What is CVE-2026-102784?

CVE-2026-102784 is a high-severity vulnerability in balbooa.com Gridbox extension for Joomla, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Joomla Extension - balbooa.com - CSRF in language installation feature Gridbox < 2.20.4.0 - PagesController uses a trait that validates the Joomla session token only when the HTTP method is POST. addLanguage does not require POST inside the action and reads url and zip through the generic request input. A GET request can therefore reach the action without the trait checking a token. The action still requires core.tools , but that is the victim’s permission check; it does not prove that the privileged user intended the request.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2026-102784?


## How do I fix CVE-2026-102784?

No fix has been published for CVE-2026-102784 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-102784 being exploited?

There is no known exploitation of CVE-2026-102784 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-102784 and fix it if it is affected.

What it is: CVE-2026-102784 is a high-severity vulnerability in balbooa.com Gridbox extension for Joomla, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-102784 in the wild and no public exploit code.

Affected product: balbooa.com Gridbox 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-2026-102784/ (Markdown: https://insights.sbomify.com/CVE-2026-102784/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-102784
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-102784
- OSV: https://osv.dev/vulnerability/CVE-2026-102784

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-102784/
Summaries are generated and may contain mistakes; the official description above is the record.