# CVE-2026-88857: File upload in OrdaSoft Joomla Gallery extension for Joomla

> Authenticated privileged users can upload and execute arbitrary PHP files due to missing validation in the OrdaSoft Joomla Gallery extension.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Sep 2026
- **Updated:** 22 Sep 2026
- **Also known as:** GHSA-7jj4-5xhm-pp7r

## What is CVE-2026-88857?

CVE-2026-88857 is a critical vulnerability in OrdaSoft.com OrdaSoft Joomla Gallery extension for Joomla, published on 20 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Joomla Extension - OrdaSoft.com - Authenticated, Privileged Remote Code Execution in OrdaSoft Joomla Gallery extension for Joomla < 6.2.7 - The extensions saveWatermark() copied an uploaded file into a web-accessible directory using the client-supplied filename exactly as sent, with no extension check, no content check, and no filename sanitisation of any kind. An authenticated core.manage user could upload a .php file disguised with an image Content-Type header and execute it directly by requesting the resulting path.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2026-88857?


## How do I fix CVE-2026-88857?

No fix has been published for CVE-2026-88857 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-88857 being exploited?

There is no known exploitation of CVE-2026-88857 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-88857 and fix it if it is affected.

What it is: CVE-2026-88857 is a critical vulnerability in OrdaSoft.com OrdaSoft Joomla Gallery extension for Joomla, published on 20 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-88857 in the wild and no public exploit code.

Affected product: OrdaSoft.com OrdaSoft Joomla Gallery 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-2026-88857/ (Markdown: https://insights.sbomify.com/CVE-2026-88857/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-88857
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-88857
- OSV: https://osv.dev/vulnerability/CVE-2026-88857

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-88857/
Summaries are generated and may contain mistakes; the official description above is the record.