CVE-2026-23768 Server-side request forgery in lucy-xss-filter
Attackers can trigger server-side requests to arbitrary URLs via specific HTML tags when security listeners are enabled, potentially exposing internal resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-23768?
CVE-2026-23768 is a medium-severity server-side request forgery vulnerability in NAVER lucy-xss-filter, published on 16 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
lucy-xss-filter before commit 7c1de6d allows an attacker to induce server-side HEAD requests to arbitrary URLs when the ObjectSecurityListener or EmbedSecurityListener option is enabled and embed or object tags are used with a src attribute missing a file extension.
Weakness: CWE-918
Which versions are affected by CVE-2026-23768?
It affects 1 product.
Products include Naver Lucy-Xss-Filter.
How do I fix CVE-2026-23768?
No fix has been published for CVE-2026-23768 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-23768 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23768 exists.
Other vulnerabilities in NAVER lucy-xss-filter
Sources
Also known as GHSA-2xhv-22cq-xj7w.