CVSS 4.0
9.5 criticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HCVE-2026-105606
Critical (9.5). EPSS 0.4% estimated probability of exploitation activity in the next 30 days.
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.
Severity
- EPSS
- 0.4% estimated probability of exploitation activity in the next 30 days; 30th percentile. Scored 2026-11-03. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: yes · Technical impact: total, assessed 2026-11-02. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-434 Unrestricted Upload of File with Dangerous Type
- Published
- Modified
- Record from
- the NVD, synced
Ask an AI about this CVE
Show the prompt
Explain CVE-2026-105606 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-105606?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-105606?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-105606 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| joomlaboat.com Custom Tables extension for Joomla | 1.0-3.7.7 |
Attack patterns (CAPEC)
- CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs Likelihood: High · Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.