CVE Catalog

CVE-2026-34735

HighCVSS 8.7
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.31%

23th percentile - higher than 23% of all known CVEs

Summary

Hytale Modding Wiki version 1.2.0 and earlier has a vulnerability in the quickUpload() endpoint. The MIME type is checked, but the filename is constructed from the client-supplied extension. An attacker can upload a PHP file that gets executed server-side.

Risk Assessment

An attacker can achieve remote code execution on the server, leading to full system compromise and data access.

Recommendation

Apply a security patch as soon as it becomes available. Temporarily disable the quickUpload() endpoint or enforce safe file extensions.

Related vulnerabilities

Original NVD description (English source)

The Hytale Modding Wiki is a free service for Hytale mods to host their documentation & wikis. In version 1.2.0 and prior, the quickUpload() endpoint validates uploaded files by checking their MIME type (via PHP's finfo, which inspects file contents) but constructs the stored filename using the client-supplied file extension from getClientOriginalExtension(). These two checks are independent: an attacker can upload a file whose content passes the MIME allowlist while using a .php extension. The file is stored on the public disk and is directly accessible via URL, allowing server-side code execution. At time of publication no known patches exist.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS