What is CVE-2026-78263?

CVE-2026-78263 is a high-severity vulnerability in Nexcess Event Tickets, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2026-08-24.

How severe is CVE-2026-78263?

High severity. CVSS v3 base score is 7.1 out of 10.

XSS in Nexcess Event Tickets

CVE-2026-78263

Unauthenticated Cross Site Scripting (XSS) in Event Tickets <= 5.29.2.1 versions.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.

Affected products

Nexcess Event Tickets

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-78263?: CVE-2026-78263 is a high-severity vulnerability in Nexcess Event Tickets, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2026-08-24.
How severe is CVE-2026-78263?: High severity. CVSS v3 base score is 7.1 out of 10.