CVE-2026-77992 Joomla Extension - fabrikar.com - heredoc terminator breakout in the calc element in Fabrik < 4.7.2
An attacker can execute arbitrary code via heredoc terminator breakout in the Fabrik extension for Joomla due to missing access checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77992?
CVE-2026-77992 is a critical code injection vulnerability in fabrikar.com Fabrik extension for Joomla, published on 22 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Joomla Extension - fabrikar.com - heredoc terminator breakout in the calc element in Fabrik < 4.7.2 - The onUpdateComment endpoint did not perform any access checks.
Weakness: CWE-94
Which versions are affected by CVE-2026-77992?
How do I fix CVE-2026-77992?
No fix has been published for CVE-2026-77992 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-77992 being exploited?
There is no known exploitation of CVE-2026-77992 in the wild and no public exploit code.
Sources
Also known as GHSA-gvj7-4928-2j6w.