Quick answers
- Is CVE-2026-79423 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-79423 being exploited in the wild.
- How severe is CVE-2026-79423?
- High severity, with a CVSS score of 8.8, published 4 September 2026.
- Which products and versions are affected?
- Seacms 13.6.
- Is there a fix for CVE-2026-79423?
- 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-2026-79423 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-79423?
- Check whether you run Seacms at an affected version. 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
This is a code injection vulnerability (CWE-94) in the admin_config.php configuration save endpoint. The application iterates over POST parameters prefixed with "edit___", strips the prefix, and uses the remaining parameter name to construct PHP variable assignments written to data/config.cache.inc.php. Because the parameter name itself is not validated against an allowlist and the output is written to an executable PHP file that is later included, an attacker can inject PHP syntax through a crafted parameter name (e.g., "edit___x;@system($_GET{0});//=poc"). Authentication as an administrator is required to reach the vulnerable endpoint. Upon successful exploitation, the attacker achieves remote code execution with web server process privileges. No vendor patch was confirmed at the time of publication.
Affected products
- SeaCMS SeaCMS 13.6
Timeline
- 2026-09-04: disclosed