What’s Vulnerable › Vulnerabilities

CVE-2026-23768

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-16 · updated 2026-06-17
• Weakness: CWE-918

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.

Affected products

• NAVER lucy-xss-filter: before 2025-06-08 — fixed in 2025-06-08

How to fix

Upgrade to a fixed version: NAVER lucy-xss-filter 2025-06-08. Check the vendor advisory for mitigations.

References

• https://cve.naver.com/detail/cve-2026-23768.html
• https://github.com/naver/lucy-xss-filter/pull/31

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