Quick answers
- Is CVE-2026-77992 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77992 being exploited in the wild.
- How severe is CVE-2026-77992?
- Informational severity, with a CVSS score of 9.8, published 22 August 2026.
- Which products and versions are affected?
- fabrikar.com Fabrik before 4.7.2.
- Is there a fix for CVE-2026-77992?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-77992 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-77992?
- Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a heredoc terminator breakout in the calc element of Fabrik, paired with insufficient access controls on the onUpdateComment endpoint. The calc element processes mathematical expressions using PHP heredoc syntax, and a specially crafted payload can break out of the heredoc terminator, allowing arbitrary PHP code injection. The onUpdateComment endpoint fails to perform authorization checks, allowing unauthenticated or low-privileged attackers to trigger the vulnerable code path. No network-based authentication is required if the endpoint is accessible. A successful exploit results in remote code execution with the privileges of the web server process. Fixed in Fabrik version 4.7.2 and later.
Affected products
- fabrikar.com Fabrik before 4.7.2
Timeline
- 2026-08-22: disclosed