What is CVE-2026-23768?

CVE-2026-23768 is a medium-severity vulnerability in Naver Lucy-Xss-Filter, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.1/10. Published 2026-01-16.

How severe is CVE-2026-23768?

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

SSRF in Naver Lucy-Xss-Filter

CVE-2026-23768

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.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-01-16 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.002 (14.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Naver Lucy-Xss-Filter — versions 7c1de6db76749ceb7b382493da29c4348853cf6b

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

cve.naver.com/detail/cve-2026-23768.html (vendor-advisory, Vendor Advisory)
github.com/naver/lucy-xss-filter/pull/31 (Exploit, Patch, mitigation)

Frequently asked questions

What is CVE-2026-23768?: CVE-2026-23768 is a medium-severity vulnerability in Naver Lucy-Xss-Filter, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.1/10. Published 2026-01-16.
How severe is CVE-2026-23768?: Medium severity. CVSS v3 base score is 6.1 out of 10.