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Vulnerability record · CVE-2026-54540 · published 27 July 2026

CVE-2026-54540: OS command injection vulnerability

Pheditor is a single-file editor and file manager written in PHP. Prior to version 2.0.5, there is an authenticated terminal command whitelist bypass. The terminal feature checks whether the submitted command starts with one of the configured TERMINAL_COMMANDS values, then passes the full command string to shell_exec(). Shell command substitution such as $() is not blocked, so an authenticated user with the terminal permission can bypass a restricted command allowlist and execute arbitrary shell commands as the web server user. This issue has been patched in version 2.0.5.

8.8 CVSS 3.1 High EPSS 0.73% · top 47.5% CWE-78 · OS command injection Deferred
8.8CVSS 3.1 base score
0.73%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
27 Jul 2026Last modified by NVD

Description

Pheditor is a single-file editor and file manager written in PHP. Prior to version 2.0.5, there is an authenticated terminal command whitelist bypass. The terminal feature checks whether the submitted command starts with one of the configured TERMINAL_COMMANDS values, then passes the full command string to shell_exec(). Shell command substitution such as $() is not blocked, so an authenticated user with the terminal permission can bypass a restricted command allowlist and execute arbitrary shell commands as the web server user. This issue has been patched in version 2.0.5.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/pheditor/pheditor/releases/tag/2.0.5
https://github.com/pheditor/pheditor/security/advisories/GHSA-9643-6xjp-vx57
https://github.com/pheditor/pheditor/security/advisories/GHSA-9643-6xjp-vx57

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Source: NIST National Vulnerability Database (record CVE-2026-54540), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.