---
id: CVE-2026-108063
title: A flaw was found in libhangul
summary: >-
  A flaw was found in libhangul. When parsing Hanja dictionary files, the
  library fails to verify that an entry contains a valid value alongside its
  key. By providing a specially crafted dictionary file to an application that
  queries it, a…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
published: '2026-10-09'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T16:37:45.710'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108063'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-108063'
    label: secalert@redhat.com
  - url: >-
      https://github.com/libhangul/libhangul/blob/5094421d9586294b2aad09924b9a54e2e6060f06/hangul/hanja.c
    label: secalert@redhat.com
  - url: 'https://github.com/libhangul/libhangul/issues/106'
    label: secalert@redhat.com
tags:
  - nvd
ingestedAt: '2026-10-09T15:00:31.365Z'
---

## Overview

A flaw was found in libhangul. When parsing Hanja dictionary files, the library fails to verify that an entry contains a valid value alongside its key. By providing a specially crafted dictionary file to an application that queries it, an attacker can trigger an unexpected application crash, resulting in a Denial of Service (DoS).

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.