---
id: CVE-2026-109854
title: A flaw was found in m17n-lib
summary: >-
  A flaw was found in m17n-lib. An attacker who supplies crafted input to an
  application processing ISO-2022 encoded text can cause the library to read
  uninitialized memory from the stack. If the application exposes or returns the
  decoded …
severity: low
cvss: 2.5
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N'
cwe:
  - CWE-457
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T10:17:15.610'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109854'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-109854'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2550285'
    label: secalert@redhat.com
  - url: >-
      https://cgit.git.savannah.nongnu.org/cgit/m17n/m17n-lib.git/commit/?id=f3b85087f90189f91c04ba1b62c5f0b879ff2b20
    label: secalert@redhat.com
  - url: 'https://lists.gnu.org/archive/html/m17n-list/2026-10/msg00001.html'
    label: secalert@redhat.com
tags:
  - nvd
ingestedAt: '2026-10-13T10:22:03.559Z'
---

## Overview

A flaw was found in m17n-lib. An attacker who supplies crafted input to an application processing ISO-2022 encoded text can cause the library to read uninitialized memory from the stack. If the application exposes or returns the decoded output, this flaw can result in unexpected behavior and limited information disclosure.

## Remediation

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