---
id: CVE-2026-107167
title: A flaw was found in m17n-lib
summary: >-
  A flaw was found in m17n-lib. A user providing specially crafted text input
  can trigger a heap use-after-free condition during input-method state
  transitions. Under specific conditions, the library frees an internal input
  context object …
severity: medium
cvss: 6.2
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-416
vendor: Red Hat
product: m17n-lib
affected:
  - m17n-lib (all versions)
  - m17n-lib
  - m17n-lib (all versions)
  - m17n-lib (all versions)
  - m17n-lib (all versions)
published: '2026-10-07'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T17:16:53.253'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107167'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-107167'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2547408'
    label: secalert@redhat.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-07T15:56:51.783816Z'
ingestedAt: '2026-10-07T15:36:04.054Z'
---

## Overview

A flaw was found in m17n-lib. A user providing specially crafted text input can trigger a heap use-after-free condition during input-method state transitions. Under specific conditions, the library frees an internal input context object but subsequently attempts to write to that freed memory. This issue can cause applications relying on the library to crash, leading to a Denial of Service (DoS), or potentially allow arbitrary code execution.

## Remediation

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