# CVE-2026-105606: Joomla Extension - joomlaboat.com - Unauthenticated arbitrary file upload in Custom Tables < 3.7.8

Status: published. Published: 2026-11-02. Updated: 2026-11-02.

Joomla Extension - joomlaboat.com - Unauthenticated arbitrary file upload in Custom Tables < 3.7.8 - An unauthenticated attacker can upload a polyglot file with an attacker-controlled extension to the web-accessible tmp directory of any Joomla site that exposes a public Custom Tables submission form, and the stored path is disclosed in the response. By default the uploaded file is served as static content, so the primary impact is an unauthenticated arbitrary file write to a web-accessible directory, which allows hosting of attacker-controlled content (for example phishing or malware pages) under the victim's domain.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- joomlaboat.com / Custom Tables extension for Joomla: 1.0-3.7.7 (affected). Source: CNA: Joomla

## Severity and prioritization

- CVSS 4.0: 9.5 (critical); CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H; source: CNA: Joomla

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable yes; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-434

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://joomlaboat.com/ (CNA: Joomla; product)

## Provenance

- CNA: Joomla: https://www.cve.org/CVERecord?id=CVE-2026-105606; retrieved 2026-11-02; source updated 2026-11-02

Revision: da07950cced9635de0bb84687e10443d6f58e43e4a518388d82bcf3212d58b41

Canonical: https://y2.dev/cve/CVE-2026-105606

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