NAVER lucy-xss-filter File Extension server-side request forgery

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in NAVER lucy-xss-filter. The impacted element is an unknown function of the component File Extension Handler. Executing a manipulation can lead to server-side request forgery. This vulnerability only affects products that are no longer supported by the maintainer. The identification of this vulnerability is CVE-2026-23768. The attack may be launched remotely. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical was found in NAVER lucy-xss-filter (affected version unknown). This vulnerability affects an unknown functionality of the component File Extension Handler. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was shared by Ksw9722 and Kim Si Ung. The advisory is shared for download at cve.naver.com. This vulnerability was named CVE-2026-23768 since 01/16/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available.

Applying the patch 7c1de6db76749ceb7b382493da29c4348853cf6b is able to eliminate this problem. The bugfix is ready for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 7c1de6db76749ceb7b382493da29c4348853cf6b

Timelineinfo

01/16/2026 Advisory disclosed
01/16/2026 +0 days CVE reserved
01/16/2026 +0 days VulDB entry created
01/16/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: cve.naver.com
Researcher: Ksw9722, Kim Si Ung
Status: Confirmed

CVE: CVE-2026-23768 (🔒)
GCVE (CVE): GCVE-0-2026-23768
GCVE (VulDB): GCVE-100-341524

Entryinfo

Created: 01/16/2026 09:49
Changes: 01/16/2026 09:49 (57)
Complete: 🔍
Cache ID: 216::103

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