Vulnerability record · CVE-2026-44666 · published 14 May 2026

CVE-2026-44666: OS command injection vulnerability

HRConvert2 is a self-hosted, drag-and-drop & nosql file conversion server & share tool. Prior to 3.3.8, the sanitizeString() function in convertCore.php is missing backtick (`) and tab (\t) from its strip list. User input then reaches shell_exec(), where the shell interprets these characters and commands within filenames execute. This vulnerability is fixed in 3.3.8.

9.3 CVSS 4.0 Critical EPSS 0.46% · top 62.6% CWE-78 · OS command injection Deferred

9.3CVSS 4.0 base score

0.46%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

3References

17 Jun 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/zelon88/HRConvert2/releases/tag/v3.3.8
https://github.com/zelon88/HRConvert2/security/advisories/GHSA-f74g-4wj8-j35h
https://github.com/zelon88/HRConvert2/security/advisories/GHSA-f74g-4wj8-j35h

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Source: NIST National Vulnerability Database (record CVE-2026-44666), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.