luanti-org/luanti

Insufficient validation of mod.conf `name`

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#16,478 opened on Sep 7, 2025

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 (2 comments) (3 reactions) (0 assignees)C++ (2,395 forks)auto 404
@ Mainmenu / SettingsmenuBugLow prioritygood first issue

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Description

Luanti 176cadc377aab87a994f5870b97486058afe24c5 on Linux

Description

  1. Create mods/test3/mod.conf
  2. Input
name = """
haha ;]
oops
"""
  1. The multiline name will look weird in the menu and after opening the mod selection menu you will also get this: 2025-09-07 12:24:08: ERROR[Main]: Invalid label element(3): '0.75,0.7;haha ;'

While there is an error if you try to activate the mod, IMO we should just filter out mods that fail validation early in the code.

Contributor guide

Research direction
Investigate the mod configuration loading code (likely in C++) and add validation for the 'name' field in mod.conf to reject invalid entries early, preventing display issues and errors.
Tech stack
None
Domain
game dev
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++Git
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75