CVE-2026-23769: Naver Lucy-Xss-Filter

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

lucy-xss-filter before commit e5826c0 allows an attacker to execute malicious JavaScript due to improper sanitization caused by misconfigured default superset rule files.

Affected products

• Naver Lucy-Xss-Filter: before 2025-06-08 (fixed in 2025-06-08)

Published 2026-01-16. Last modified 2026-06-17.