Vulnerability Description
WebDyne versions from 3.007 before 3.022 for Perl execute .psp files outside the document root via path traversal in the PSGI API route fallback. When a request matches no file, the PSGI handler retries it as an API route through api_filename. That keeps .. segments in the request path and only checks that the joined path starts with the document root, which a request for /../private passes. A remote attacker can run the embedded Perl in any .psp file the server can read, such as one uploaded to a directory outside the document root.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-78189?
CVE-2026-78189 is a documented vulnerability. WebDyne versions from 3.007 before 3.022 for Perl execute .psp files outside the document root via path traversal in the PSGI API route fallback. When a request matches no file, the PSGI handler retr...
How severe is CVE-2026-78189?
CVSS scoring is not yet available for CVE-2026-78189. Check NVD for updates.
Is there a patch for CVE-2026-78189?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.