---
id: CVE-2026-107570
title: >-
  heap OOB write in convert_file_from_to() via a crafted Content-Type header
  allows attacker to OOB write when email is used as a template.
summary: >-
  heap OOB write in convert_file_from_to() via a crafted Content-Type header
  allows attacker to OOB write when email is used as a template.
severity: low
cvss: 2.5
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-823
vendor: mutt
product: mutt
affected:
  - mutt <= 2.4.2
published: '2026-10-08'
updated: '2026-10-10'
sourceUpdated: '2026-10-10T00:17:03.540'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107570'
references:
  - url: 'https://gitlab.com/muttmua/mutt/-/work_items/533'
    label: cve@gitlab.com
  - url: 'http://www.openwall.com/lists/oss-security/2026/10/09/21'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
epss: 0.00152
epssPercentile: 0.04256
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-08T13:42:27.582213Z'
ingestedAt: '2026-10-08T12:39:48.753Z'
---

## Overview

heap OOB write in convert_file_from_to() via a crafted Content-Type header allows attacker to OOB write when email is used as a template.

## Remediation

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