What is CVE-2026-39428?

CVE-2026-39428 is a medium-severity vulnerability in Cubecart V6, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-05-13.

How severe is CVE-2026-39428?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Cubecart V6

CVE-2026-39428

CubeCart is an ecommerce software solution. Prior to 6.6.0, a Stored Cross-Site Scripting (XSS) vulnerability exists in CubeCart v6.x. An attacker with administrative privileges can inject malicious JavaScript payloads into multiple fields…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (8.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Cubecart V6 — versions < 6.6.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-39428?: CVE-2026-39428 is a medium-severity vulnerability in Cubecart V6, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-05-13.
How severe is CVE-2026-39428?: Medium severity. CVSS v3 base score is 4.8 out of 10.