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CVE-2026-76597HighCVSS 8.7CVE published 22 August 2026Added to mySites.guru 22 August 2026

Fabrik (com_fabrik) 4.7.0 and 4.7.1 - Unauthenticated Remote Code Execution risk, update to 4.7.2

Fabrik (the Joomla form and list builder by Fabrikar) shipped a series of security releases across the 4.7.x line. 4.7.2 is the release mySites.guru has verified, and 4.7.0 and 4.7.1 are missing part of that work. The calc element in this component carried a published unauthenticated remote code execution vulnerability (CVE-2026-66915 and CVE-2026-67282, both CVSS 10.0). mySites.guru worked with Fabrikar through the 4.7.x releases under coordinated disclosure, and 4.7.2 closes the issues raised. What to do: update Fabrik to 4.7.2, downloaded from fabrikar.com. Until you have, restrict front-end access to Fabrik forms and lists to trusted users. Sites below 4.7.0 are covered by a separate rule and remain exposed to the published CVSS 10.0 RCE.

Is my site affected?

Affected
Fabrik from 4.7.0 up to but not including 4.7.2
Fixed in
4.7.2
What to do
Update Fabrik to 4.7.2 or later.
Check whether your sites are affected

How CVE-2026-76597 is scored

The base metrics as Joomla CNA published them, and what each one means for a site running an affected version. Threat and environmental metrics are left out: they describe a moment or a particular install rather than the flaw.

8.7 High

CVSS 4.0, scored by Joomla CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

How it is reached

AV:N Attack vector
Network. Reachable across the internet
AC:L Attack complexity
Low. Nothing to work around, it just works
AT:N Attack requirements
None. Works against any affected install
PR:N Privileges required
None. No account needed
UI:N User interaction
None. Nobody has to be tricked into anything

What it does to the site

VC:N Confidentiality
None. Nothing can be read
VI:H Integrity
High. Data and files can be altered at will
VA:N Availability
None. The site stays up

What it does beyond the site

SC:N Confidentiality
None. Other systems keep their data
SI:N Integrity
None. Other systems keep their integrity
SA:N Availability
None. Other systems stay up

The rule below is rated Critical for the set of 17 CVEs it covers together, not for this record on its own.

Timeline

  1. 10 August 2026We published: The Fabrik Fiasco: Announced, Restricted, Relabelled
  2. 22 August 2026CVE-2026-76597 record published by its CNA
  3. 22 August 2026mySites.guru check added for Fabrik (from 4.7.0 up to but not including 4.7.2)

Rule details

Our disclosure post

The Fabrik Fiasco: Announced, Restricted, Relabelled

The Fabrik Fiasco: Announced, Restricted, Relabelled

Two CVSS 10.0 RCEs in the Fabrik Joomla extension, and a chaotic run of security releases since. The vendor has moved past 4.7.0; be on 4.7.2.

Other vulnerabilities in Fabrik

Updating for CVE-2026-76597 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension.

Fabrik

Latest safe version: 4.7.2

All 20 CVEs in Fabrik

References

CVE-2026-76597 questions

Which versions are affected by CVE-2026-76597?
CVE-2026-76597 affects Fabrik from 4.7.0 up to but not including 4.7.2. The fix is in 4.7.2.
How do I fix CVE-2026-76597?
Update Fabrik to 4.7.2 or later. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
How severe is CVE-2026-76597?
Joomla CNA scores it 8.7 (High) under CVSS 4.0. In plain terms: reachable across the internet, no account needed and nobody has to be tricked into anything.

Running an affected version on a site you manage?

A free audit tells you which of your Joomla and WordPress sites run an affected version, which are out of date, and which have not been backed up. No card required. If a site is already compromised, fix.mysites.guru is a single fixed fee per incident, usually resolved the same day.

This check is part of the mySites.guru Joomla vulnerability scanner, which reads every installed extension's version on each audit. Browse the rest of the Joomla vulnerability database.

Rules current as of 5 October 2026.