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CVE-2026-76605 – Unauthenticated Remote Code Execution – Fabrik Joomla Extension 1.0.0 through 4.7.3

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Summary

CVE-2026-76605 is a critical remote code execution vulnerability in the Fabrik extension for Joomla (fabrikar.com), caused by improper control of code generation (CWE-94) in the extension’s image element component. The flaw affects every released version of Fabrik from 1.0.0 through 4.7.3 and carries a maximum CVSS v4.0 base score of 10.0 (Critical), as it requires no authentication and no user interaction to exploit over the network.

Technical details

  • Root cause: Improper control of generation of code (CWE-94 – code injection) within Fabrik’s image element component.
  • Trigger conditions: The vulnerable code path is reachable through the image element functionality shipped with com_fabrik on any Joomla site running an affected Fabrik version.
  • Attack vector: Network-based (AV:N), with low attack complexity, no attack requirements, no privileges required, and no user interaction (per the published CVSS v4.0 vector).
  • Impact: High confidentiality, integrity, and availability impact at both the vulnerable-system and subsequent-system level, consistent with full remote code execution on the affected web server.

Affected software

  • Fabrik extension for Joomla, versions 1.0.0 through 4.7.3 (all releases up to and including 4.7.3).

Severity

  • CVSS v4.0 Base Score: 10.0 (Critical)
  • 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
  • CWE-94: Improper Control of Generation of Code (‘Code Injection’)

Mitigation and recommended actions

  • Immediate: Upgrade Fabrik to a release newer than 4.7.3. At the time of publication, the vendor (fabrikar.com) had not published a detailed advisory naming the specific fixed version — administrators should check the official Fabrik downloads/changelog and apply the latest available release.
  • If no patch can be applied immediately: Restrict or disable public access to the Fabrik image element functionality (e.g., via web server or WAF rules blocking the relevant com_fabrik front-end endpoints) until the update is applied, and monitor web server logs for anomalous requests targeting com_fabrik.

References

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