CVE-2026-23769 Cross-site scripting in lucy-xss-filter
Attackers can execute malicious JavaScript via improper sanitization in the lucy-xss-filter library when default superset rules are misconfigured.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-23769?
CVE-2026-23769 is a medium-severity cross-site scripting vulnerability in NAVER lucy-xss-filter, published on 16 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
lucy-xss-filter before commit e5826c0 allows an attacker to execute malicious JavaScript due to improper sanitization caused by misconfigured default superset rule files.
Weakness: CWE-79
Which versions are affected by CVE-2026-23769?
It affects 1 product.
Products include Naver Lucy-Xss-Filter.
How do I fix CVE-2026-23769?
No fix has been published for CVE-2026-23769 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-23769 being exploited?
There is no known exploitation of CVE-2026-23769 in the wild and no public exploit code.
Other vulnerabilities in NAVER lucy-xss-filter
Sources
Also known as GHSA-vv6w-5g5j-5p4w.