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

- Exploited (CISA KEV): no
- Published: 2026-11-02
- CVSS: 9.5 CRITICAL (v4.0)
- EPSS: no score
- CWE: CWE-434

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | No public claim | — | — |
| F5 | No public claim | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

## Social

4 posts seen since 2026-11-02.

- bluesky 2026-11-02: Custom Tables for Joomla below 3.7.8: anyone can upload a file to the tmp folder via a public submission form, no login. CVE-2026-105606, 9.5 Critical. Update: mysites.guru/blog/custom-... (https://bsky.app/profile/mysites.guru/post/3mze7glk75m2i)
- x 2026-11-02: Custom Tables for Joomla below 3.7.8: anyone can upload a file to the tmp folder via a public submission form, no login. CVE-2026-105606, 9.5 Critical. Update: https://t.co/4He6nZJXB3 https://t.co/k9ESCJsGQs (https://x.com/mysitesguru/status/2117354067609452981)
- bluesky 2026-11-02: CVE-2026-105606 - custom tables extension for joomla A public form in the Joomlaboat Custom Tables extension for Joomla lets strangers place files on your website’s temporary folder. This means attackers can host phishing or…  Too many irrelevant or confusing CVEs? Use stackflag… (https://bsky.app/profile/stackflag.bsky.social/post/3mze5jlvvkh2z)
- bluesky 2026-11-02: 🚨 CVE-2026-105606 — CVSS 9.5 CRITICAL  Joomla Extension - joomlaboat.com - Unauthenticated arbitrary file upload in Custom Tables < 3.7.8 - An una...  🔎 https://stemshop.top/cve/CVE-2026-105606  #CVE #CyberSecurity #InfoSec (https://bsky.app/profile/stemshop.bsky.social/post/3mze4u2fwz62t)

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

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