# CVE-2026-56291 — balbooa.com Balbooa Forms extension for Joomla **CISA KEV** > As of 2026-07-11, CVE-2026-56291 is a CRITICAL-severity vulnerability in balbooa.com Balbooa Forms extension for Joomla, CVSS v3.1 9.8, EPSS 0.8% (53.4th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-07-10), with a US federal remediation deadline of 2026-07-13. Threadlinqs Intelligence links 4 tracked threat campaigns to CVE-2026-56291, most recently “CVE-2026-48939 & CVE-2026-56291: Perfect-10 Joomla Extension Bugs (iCagenda, Balbooa Forms) Actively Exploited, Added to CISA KEV”. **Last updated:** 2026-07-11 ## What is 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. The record classifies CVE-2026-56291 under weakness class [CWE-434](https://cwe.mitre.org/data/definitions/434.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 65 days ago. ## Severity and exploitation probability - **CVSS v3.1 base score:** 9.8 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`) - **CVSS v4.0 base score:** 10 (`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 (FIRST):** 0.8% probability of exploitation in the next 30 days, higher than 53.4% of all scored CVEs - **CISA KEV:** Listed since 2026-07-10, federal remediation deadline 2026-07-13 - **Threadlinqs priority:** 9/10 — CISA KEV-listed, which Threadlinqs floors at 9 - **Published:** 2026-07-09, last modified 2026-07-11 ## Is CVE-2026-56291 being exploited? CISA added CVE-2026-56291 to the Known Exploited Vulnerabilities catalog on 2026-07-10, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-07-13 under BOD 22-01. Weaponised exploit code for CVE-2026-56291 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 60 in the Threadlinqs vulnerability feed. - [shinthink/CVE-2026-56291](https://github.com/shinthink/CVE-2026-56291) (github) - [trickest/cve](https://github.com/trickest/cve/blob/main/2026/CVE-2026-56291.md) (trickest) ## Affected products and versions - **balbooa.com**: Balbooa Forms extension for Joomla ## How to fix CVE-2026-56291 Because CVE-2026-56291 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-07-13. No vendor patch reference has been recorded for CVE-2026-56291 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise. ## Threat activity tracking CVE-2026-56291 4 tracked threats in the Threadlinqs corpus reference CVE-2026-56291, either in the campaign’s CVE list or as an indicator on the campaign record. - [CVE-2026-48939 & CVE-2026-56291: Perfect-10 Joomla Extension Bugs (iCagenda, Balbooa Forms) Actively Exploited, Added to CISA KEV](https://intel.threadlinqs.com/threat/TL-2026-1300) — CRITICAL · 2026-07-14 - [Zero-Day Exploitation of Joomla iCagenda and Balbooa Forms Extensions via Unauthenticated Arbitrary File Upload (CVE-2026-48939, CVE-2026-56291)](https://intel.threadlinqs.com/threat/TL-2026-1254) — CRITICAL · 2026-07-13 - [CISA KEV: Joomla iCagenda (CVE-2026-48939) and Balbooa Forms (CVE-2026-56291) Unrestricted File Upload Flaws Under Active Exploitation](https://intel.threadlinqs.com/threat/TL-2026-1266) — CRITICAL · 2026-07-13 - [CISA Warns of Actively Exploited RCE Flaws in Joomla Extensions — iCagenda (CVE-2026-48939) and Balbooa Forms (CVE-2026-56291) Arbitrary File Upload](https://intel.threadlinqs.com/threat/TL-2026-1267) — CRITICAL · 2026-07-13 ## Sources Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-07-13. This product uses the NVD API but is not endorsed or certified by the NVD. **Third-party advisory** - [mysites.guru — third party advisory](https://mysites.guru/blog/balbooa-forms-unauthenticated-file-upload-flaw/) **Issue tracking and product pages** - [balbooa.com — product](https://www.balbooa.com/joomla-forms) Canonical: https://intel.threadlinqs.com/cve/CVE-2026-56291 Full detection coverage and IOCs for threats exploiting CVE-2026-56291 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp