Pico 3.0.0-alpha.2 Exploit __link__ Jun 2026

If an immediate upgrade is impossible, implement these temporary security controls:

: After the preprocessor "patches" or processes the string, the code is no longer treated as a string and is instead executed as regular Lua-based code by the PICO-8 engine.

Failing to sanitize dynamic string components like ../ before file system searches. Pico 3.0.0-alpha.2 Exploit

If you are running Pico 3.0.0-alpha.2, you must take immediate action to secure your infrastructure. 1. Upgrade Immediately (Recommended)

An attacker submits a crafted HTTP POST request to the theme preview endpoint (which does not require authentication in alpha builds): If an immediate upgrade is impossible, implement these

Prior to patching, a target payload is placed entirely within a multi-line string block, evaluating to a minimal token footprint (often costing only 1 token).

(Note: The exact character sequence depends on the specific preprocessor "weirdness" mentioned in the alpha.2 release notes.) Impact & Remediation If an immediate upgrade is impossible

The primary attack vectors identified in this version include: