CVE-2026-56291: The Joomla extension Balbooa Forms is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
The Joomla extension Balbooa Forms is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
CSIRTS triage
- What
- The Joomla extension Balbooa Forms is vulnerable to an unauthenticated arbitrary file upload leading to full RCE.
- Who is affected
- Deployments of the Joomla extension Balbooa Forms.
- Urgency
- Remediation is critical due to active exploitation and high severity.
- Action
- Patch Balbooa Forms to the latest version to address the vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-56291
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2026-56291Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 20% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-56291 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- highexploitedCISA Adds Two Known Exploited Vulnerabilities to Catalogcisa
- criticalexploitedCVE-2026-56291: Balbooa Forms Unrestricted Upload of File with Dangerous Type Vulnerabilitycisa-kev
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