What is CVE-2026-81778?

CVE-2026-81778 is a medium-severity vulnerability in The4 Kalles Addons, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-08-31.

How severe is CVE-2026-81778?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XSS in The4 Kalles Addons

CVE-2026-81778

Subscriber Cross Site Scripting (XSS) in Kalles Addons <= 1.0.6 versions.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L.

Affected products

The4 Kalles Addons

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-81778?: CVE-2026-81778 is a medium-severity vulnerability in The4 Kalles Addons, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-08-31.
How severe is CVE-2026-81778?: Medium severity. CVSS v3 base score is 6.5 out of 10.