Quick answers
- Is CVE-2026-67397 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-67397 being exploited in the wild.
- How severe is CVE-2026-67397?
- Informational severity, published 4 September 2026.
- Which products and versions are affected?
- Plesk 18.0.79.9 and earlier, 18.0.80 through 18.0.80.5.
- Is there a fix for CVE-2026-67397?
- 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-2026-67397 attacked?
- It is attacked with local access, in a network appliance.
- Am I affected by CVE-2026-67397?
- Check whether you run Plesk 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
The vulnerability is a path traversal flaw in Plesk versions 18.0.79.9 and earlier, and 18.0.80 through 18.0.80.5. A local user can manipulate file paths to bypass directory restrictions and execute arbitrary code with root-level privileges. The attack requires local access to the Plesk server; no network exploitation is possible. Successful exploitation results in complete system compromise with root-level code execution. Patches addressing this vulnerability are available for affected versions.
Affected products
- Plesk Plesk 18.0.79.9 and earlier, 18.0.80 through 18.0.80.5
Timeline
- 2026-09-04: disclosed