TI-2026-40117 Aliases CVE-2026-55578 GHSA-wg4w-wr5q-6vjc

OS command injection in pheditor

MEDIUM 41CWE-78Published 2026-07-27 · Updated 2026-07-28

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

Pheditor is a single-file editor and file manager written in PHP. From version 2.0.1 to before version 2.0.6, the terminal feature in Pheditor uses an incomplete character blocklist to sanitize user-supplied commands before passing them to shell_exec(). After the fix for GHSA-9643-6xjp-vx57 (which added $ to the blocklist), the characters | (single pipe), ` (backtick), and the newline byte (0x0A) remain unblocked. An authenticated user with the terminal permission (enabled by default) can leverage any of these to bypass the TERMINAL_COMMANDS allowlist and execute arbitrary OS commands as the web server user. This issue has been patched in version 2.0.6.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00667 52nd percentileScored 2026-11-07

Fix Fixed pheditor (pheditor): 2.0.6pheditor/pheditor (Packagist): 2.0.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
pheditor	pheditor	2.0.1 to before 2.0.6	2.0.6	Patch available	CNA
—	pheditor/pheditor (Packagist)	2.0.1 to before 2.0.6	2.0.6	Patch available	GHSA-wg4w-wr5q-6vjc

pheditor Vendorpheditor Affected 2.0.1 to before 2.0.6 Fixed in 2.0.6 Patch available CNA
pheditor/pheditor (Packagist) Vendor— Affected 2.0.1 to before 2.0.6 Fixed in 2.0.6 Patch available GHSA-wg4w-wr5q-6vjc

Remediation

Fix · CNA pheditor (pheditor) Fixed in 2.0.6
Fix · GHSA-wg4w-wr5q-6vjc pheditor/pheditor (Packagist) Fixed in 2.0.6 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-55578
2026-10-03 Alias added: GHSA-wg4w-wr5q-6vjc

References

Other 4

TI-2026-40118 Pheditor: Hardcoded default password 'admin' with no forced change enables full application compromise CVSS 3.1CRITICAL 9.8
TI-2026-35473 Pheditor: OS Command Injection in terminal handler via unsanitized 'dir' parameter (CWE-78) CVSS 3.1CRITICAL 9.9
TI-2026-39379 Authenticated terminal command whitelist bypass in Pheditor CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences