What is CVE-2026-4591?

CVE-2026-4591 is a medium-severity vulnerability in Kalcaddle Kodbox, classified under Command Injection. CVSS score: 4.7/10. Published 2026-03-23.

How severe is CVE-2026-4591?

Medium severity. CVSS v3 base score is 4.7 out of 10.

RCE in Kalcaddle Kodbox

CVE-2026-4591

A weakness has been identified in kalcaddle kodbox 1.64. This affects the function checkBin of the file /workspace/source-code/plugins/fileThumb/app.php of the component fileThumb Endpoint. Executing a manipulation can lead to os command i…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.003 (56.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.

Affected products

Kalcaddle Kodbox — versions 1.64

Weakness classification (CWE)

References

VDB-352427 | kalcaddle kodbox fileThumb Endpoint app.php checkBin os command injection (technical-description, vdb-entry)
VDB-352427 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
Submit #775470 | Kodbox 1.64 Command Injection (third-party-advisory)
cna@vuldb.com (exploit, broken-link)

Frequently asked questions

What is CVE-2026-4591?: CVE-2026-4591 is a medium-severity vulnerability in Kalcaddle Kodbox, classified under Command Injection. CVSS score: 4.7/10. Published 2026-03-23.
How severe is CVE-2026-4591?: Medium severity. CVSS v3 base score is 4.7 out of 10.