CVE-2026-56291
CriticalExploitedPublic exploitThe Joomla extension Balbooa Forms is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
Published Jul 9, 2026 · Updated Aug 12, 2026 · Also known as EUVD-2026-42573
Key Facts
Patch immediately- CVE-2026-56291 is a critical-severity vulnerability (CVSS 10.0 v4) affecting Forms (Balbooa), balbooa.com Balbooa Forms extension for Joomla.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jul 8, 2026. Public exploit code is available.
- EPSS estimates a 15% probability of exploitation in the next 30 days.
- Fixed versions are available, including Forms 2.4.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
10.0
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
EPSS (30-day exploit likelihood)
15%
Higher than 96.6% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
Joomla Extension - balbooa.com - Unauthenticated file upload in Balbooa Forms extension < 2.4.1 - The Joomla extension Balbooa Forms is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jul 10, 2026 | Jul 13, 2026 | Not reported |
| Industry KEV feed | Jul 8, 2026 | Jul 13, 2026 | Not reported |
| CIRCL KEV | Jul 10, 2026 | Jul 13, 2026 | Not reported |
| ENISA EUVD | Jul 10, 2026 | n/a | Not reported |
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.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FormsBalbooa | See advisory | 2.4.1 |
| balbooa.com Balbooa Forms extension for Joomla | >= 1.0-2.4.0 | n/a |
Patched Releases
Forms
2.4.1
Timeline
Added to Industry KEV feed
Jul 8, 2026
Publicly disclosed
Jul 9, 2026
Added to CISA KEV
Jul 10, 2026
Added to CIRCL KEV
Jul 10, 2026
Added to ENISA EUVD
Jul 10, 2026
Last updated
Aug 12, 2026
Weakness Type
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- otherVulnCheck exploitation report
FAQ
Common Questions.
Joomla Extension - balbooa.com - Unauthenticated file upload in Balbooa Forms extension < 2.4.1 - The Joomla extension Balbooa Forms is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
Affected: Forms (Balbooa); balbooa.com Balbooa Forms extension for Joomla versions >= 1.0-2.4.0. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jul 8, 2026.
Yes. It was added on Jul 10, 2026 with a federal remediation due date of Jul 13, 2026.
Public exploit code is available.
Fixed versions are available, including Forms 2.4.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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