CVE-2026-56291

Published Jul 9, 2026

Last updated a day ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-56291 is a vulnerability found in the Joomla extension Balbooa Forms. It is categorized as an unauthenticated arbitrary file upload flaw, meaning an attacker can upload executable files without needing to authenticate to the system. This capability can lead to full Remote Code Execution (RCE) on affected systems. The vulnerability has been added to CISA's Known Exploited Vulnerabilities Catalog, indicating that it is being actively exploited in the wild.

Description: The Joomla extension Balbooa Forms is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
Source: security@joomla.org
NVD status: Analyzed
Products: forms

Risk scores

CVSS 4.0

Type: Secondary
Base score: 10
Impact score: -
Exploitability score: -
Vector string: 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:Red
Severity: CRITICAL

CVSS 3.1

Type: Primary
Base score: 9.8
Impact score: 5.9
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: CRITICAL

Known exploits

Data from CISA

Vulnerability name: Balbooa Forms Unrestricted Upload of File with Dangerous Type Vulnerability
Exploit added on: Jul 10, 2026
Exploit action due: Jul 13, 2026
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.

Weaknesses

security@joomla.org: CWE-434

Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.

Hype score: 3

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:balbooa:forms:*:*:*:*:*:joomla\\!:*:*",
            "matchCriteriaId": "A5149F96-A82C-4C48-B4A5-D8AD99418D47",
            "versionEndExcluding": "2.4.1",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.