CVE-2026-55579: Pheditor

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

Pheditor is a single-file editor and file manager written in PHP. From version 2.0.1 to before version 2.0.6, Pheditor ships with a hardcoded default password admin (SHA-512 hash stored at pheditor.php:11). There is no mechanism to force a password change on first login. Any deployment using the default credentials grants an attacker full access to the file editor, file upload, and terminal features, enabling arbitrary file read/write and remote code execution. This issue has been patched in version 2.0.6.

Affected products

• Pheditor Pheditor: from 2.0.1, before 2.0.6 (fixed in 2.0.6)

Published 2026-07-27. Last modified 2026-07-27.