CVE-2026-44666

HRConvert2: Missing Sanitization enables Unauthenticated Remote Command Execution

CVSS 9.3 CRITICALEPSS 0.3%CWE-78

Vexday Risk Score

28Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 9.3EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

14 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

zelon88 · HRConvert2

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References

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