Directory Traversal Vulnerability in ConvertX File Conversion Service
CVE-2026-59976

8.1HIGH

Key Information:

Vendor

C4illin

Status
Convertx
Vendor
CVE Published:
12 October 2026

What is CVE-2026-59976?

ConvertX, a self-hosted file conversion service, has a directory traversal vulnerability due to improper sanitization of the 'convert_to' parameter in its ImageMagick converter. An authenticated user, or an unauthenticated user when permissions allow, can upload an extensionless image and inject directory traversal sequences. This flaw enables attackers to manipulate the output path, leading to potential overwriting of files or service disruption. The issue has been addressed in version 0.18.0.

Affected Version(s)

ConvertX < 0.18.0

References

https://github.com/C4illin/ConvertX/security/advisories/G...
x_refsource_CONFIRM
https://github.com/C4illin/ConvertX/pull/532
x_refsource_MISC
https://github.com/C4illin/ConvertX/commit/0965928949319e...
x_refsource_MISC

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.