CVE-2026-56291 CRITICAL

CVE-2026-56291: Joomla Extension - balbooa.com - Unauthenticated file upload in Balbooa Forms extension < 2.4.1

Vendor Balbooa.com
Product balbooa.com Balbooa Forms extension for Joomla
Weakness CWE-434 · Unrestricted file upload
KEV Status Known Exploited
Published July 9, 2026
Last update July 11, 2026
View on NVD All CVEs

CVSS base score

10.0/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red

What the vulnerability does

01Description

The Joomla extension Balbooa Forms is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.

Explanation of Vulnerability in Simple Terms

02Summary

The Balbooa Forms extension for Joomla contains an unrestricted file upload vulnerability that allows unauthenticated attackers to upload arbitrary files to the server over the network. An attacker can exploit this to upload malicious files, potentially gaining control of the site. No user interaction is required to trigger the vulnerability.

What an attacker can do

03Attacker Capabilities

Upload arbitrary files to the server without authentication, potentially executing malicious code.

Potential impact on your site

04Site Impact

An attacker can upload and execute malicious files, compromising your entire Joomla installation and hosted data.

Conditions required to exploit

05Prerequisites

Network access to the Joomla site; no authentication or user interaction required.

CISA mandated remediation

06CISA Required Action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Key dates

07Disclosure timeline

July 9, 2026 CVE published
July 11, 2026 Record updated

External resources

08References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-56291 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/434.html AskarLabs — CWE-434 write-up Unrestricted Upload of File with Dangerous Type CISA KEV Reference https://www.balbooa.com/joomla-forms CISA KEV Reference https://www.cisa.gov/news-events/directives/bod-26-04-prioriti… CISA KEV Reference https://www.cisa.gov/news-events/directives/bod-26-04-implemen… CISA KEV Reference https://nvd.nist.gov/vuln/detail/CVE-2026-56291

Related vulnerabilities

09Related CVE

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