C4illin ConvertX up to 0.16.x /delete filename path traversal

Summaryinfo

A vulnerability was found in C4illin ConvertX up to 0.16.x and classified as critical. Affected is an unknown function of the file /delete. Executing a manipulation of the argument filename can lead to path traversal. The identification of this vulnerability is CVE-2026-24741. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in C4illin ConvertX up to 0.16.x. This vulnerability affects an unknown code of the file /delete. The manipulation of the argument filename with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect integrity, and availability. CVE summarizes:

ConvertXis a self-hosted online file converter. In versions prior to 0.17.0, the `POST /delete` endpoint uses a user-controlled `filename` value to construct a filesystem path and deletes it via `unlink` without sufficient validation. By supplying path traversal sequences (e.g., `../`), an attacker can delete arbitrary files outside the intended uploads directory, limited only by the permissions of the server process. Version 0.17.0 fixes the issue.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-24741 since 01/26/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 0.17.0 eliminates this vulnerability. Applying the patch 7a936bdc0463936463616381ca257b13babc5e77 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• C4illin

Name

• ConvertX

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16

License

• open-source

Website

• Product: https://github.com/C4illin/ConvertX/

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