What is CVE-2026-23769?

CVE-2026-23769 is a medium-severity vulnerability in Naver Lucy-xss-filter, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-16.

How severe is CVE-2026-23769?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Naver Lucy-xss-filter

CVE-2026-23769

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

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (9.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Naver Lucy-xss-filter — versions e5826c0d26b4f546955279767bbe94e5c7ed3f15

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@navercorp.com (vendor-advisory, Vendor Advisory)
cve@navercorp.com (Patch, mitigation)

Frequently asked questions

What is CVE-2026-23769?: CVE-2026-23769 is a medium-severity vulnerability in Naver Lucy-xss-filter, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-16.
How severe is CVE-2026-23769?: Medium severity. CVSS v3 base score is 6.1 out of 10.