CVE WatchJul 24, 2026

CVE-2026-34735

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()

CVSS

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No CVSS

EPSS

0.3%

p23

KEV

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Exploit Today

0-100

Published: Apr 2, 2026 · Last modified: Jul 24, 2026 · CWE-434

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-08-132026-09-09

Technical description

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.

Official references

github.comhttps://github.com/HytaleModding/wiki/security/advisories/GHSA-2xqq-6778-h4j9

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