---
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
vendor: C4illin
product: ConvertX
affected:
  - ConvertX < 0.18.0
published: '2026-10-12'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T20:04:29.760'
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
  - url: >-
      https://github.com/C4illin/ConvertX/security/advisories/GHSA-pvqw-vc5x-266j
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00769
epssPercentile: 0.55391
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-13T16:32:26.045737Z'
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.