---
id: CVE-2026-59976
title: ConvertX is a self-hosted file conversion service
summary: >-
  ConvertX is a self-hosted file conversion service. Prior to 0.18.0, the
  ImageMagick converter uses the unsanitized convert_to parameter to construct
  an output path. If an authenticated user, or an unauthenticated user when
  ConvertX is co…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-22
  - CWE-73
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T19:16:39.260'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59976'
references:
  - url: >-
      https://github.com/C4illin/ConvertX/commit/0965928949319e2839770fbf57a8337440d42630
    label: security-advisories@github.com
  - url: 'https://github.com/C4illin/ConvertX/pull/532'
    label: security-advisories@github.com
  - url: 'https://github.com/C4illin/ConvertX/releases/tag/v0.18.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/C4illin/ConvertX/security/advisories/GHSA-pvqw-vc5x-266j
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-12T20:03:12.355Z'
---

## Overview

ConvertX is a self-hosted file conversion service. Prior to 0.18.0, the ImageMagick converter uses the unsanitized convert_to parameter to construct an output path. If an authenticated user, or an unauthenticated user when ConvertX is configured to allow unauthenticated access, uploads an extensionless image and supplies directory traversal sequences in convert_to through /convert, the constructed path escapes the intended output directory, allowing the attacker to write converted output to arbitrary container paths, potentially overwriting files or causing denial of service. This issue is fixed in version 0.18.0.

## Remediation

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