CVE-2026-44666

CRITICAL

HRConvert2: Missing Sanitization enables Unauthenticated Remote Command Execution

Title source: cna

Description

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.

References (2)

Core 2

Core References

X_Refsource_Confirm x_refsource_confirm

https://github.com/zelon88/HRConvert2/security/advisories/GHSA-f74g-4wj8-j35h

X_Refsource_Misc x_refsource_misc

https://github.com/zelon88/HRConvert2/releases/tag/v3.3.8

Scores

CVSS v4 9.3

EPSS 0.0030

EPSS Percentile 21.2%

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:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-78

Status published

Products (1)

zelon88/HRConvert2 < 3.3.8

Published May 14, 2026

Tracked Since May 15, 2026