Quick answers
- Is CVE-2026-54453 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-54453 being exploited in the wild.
- How severe is CVE-2026-54453?
- High severity, with a CVSS score of 7.2, published 28 October 2026.
- Which products and versions are affected?
- OpenCATS prior to 0.10.0.
- Is there a fix for CVE-2026-54453?
- Yes: fixed in 0.10.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-54453 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-54453?
- Check whether you run OpenCATS 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.
How to fix
- Fixed in: 0.10.0
Technical details
The SettingsUI module's manageProfessional feature constructs PHP define() statements from user-supplied license key input without proper escaping before writing to config.php. When config.php is included, the malicious PHP syntax alteration executes arbitrary code in the web server context. Exploitation requires authentication as an administrator with Settings module access and write permissions to config.php; the vulnerability enables reading/modifying application data and launching further attacks.
Affected products
- OpenCATS OpenCATS prior to 0.10.0
Timeline
- 2026-10-28: disclosed