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ExploitedIn CISA KEVFix available

CVE-2026-56291

Exploitation confirmed. First attested on 2026-07-10 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2026-07-09
  • Fixed in2.4.1
  • WeaknessCWE-434

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-07-0911:16CVE publishedNVD
  2. 2026-07-10Added to the CISA KEV catalogCISA KEV
  3. 2026-07-10Listed as exploited by GCVEGCVE
  4. 2026-07-10Exploitation first reportedCISA KEV
  5. 2026-07-1017:37SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-56291?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-56291?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Balbooa forms
BranchAffectedFixed in
2.4< 2.4.12.4.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As Joomla, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • balbooa.com Balbooa Forms extension for Joomlaother versions: not affected
    Affected
    • = 1.0-2.4.0no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-08-12

Fix

  1. Update Balbooa forms to 2.4.1
  2. CISA’s 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.due 2026-07-13

Detection

read 2026-11-02 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
5 repositories, unverifiedshinthink/CVE-2026-56291rimbadirgantara/CVE-2026-56291.yaml0xdenis77/CVE-2026-56291ChiefYoru/CVE-2026-56291_PoCtheendofabbys/CVE-2026-56291
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2026-07-10
Patch Due Date
2026-07-13
Ransomware Use
Unknown
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.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 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/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
Published
2026-07-09
Last Modified
2026-10-25
NVD status
Analyzed
GitHub Advisory
GHSA-28f5-j5p5-xmmw

Frequently asked questions

What is CVE-2026-56291?

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.

Is CVE-2026-56291 actively exploited?

Yes. CVE-2026-56291 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-07-13.

What is the CVSS score for CVE-2026-56291?

CVE-2026-56291 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record