CVE-2026-47695
CC: Tweaked is a mod for Minecraft which adds programmable computers, turtles, and more to the game.
Impact
CC: Tweaked is a mod for Minecraft which adds programmable computers, turtles, and more to the game. Prior to version 1.119.0, CC-Tweaked's HTTP API (`http.request`, `http.websocket`) blocks requests to private network ranges to prevent server-side request forgery (SSRF). This protection can be bypassed on IPv6-capable servers using NAT64 well-known prefix addresses (`64:ff9b::/96`). An attacker who can execute Lua code can reach any internal IPv4 service that the filter is intended to block, by addressing it as `http://[64:ff9b::<ipv4-as-hex>]/` instead of its direct IPv4 address. This affects any CC-Tweaked deployment on a network with NAT64 routing — a configuration that is standard on AWS, GCP, and other cloud platforms when using IPv6-only subnets. Version 1.119.0 fixes the issue.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | cc.tweaked:cc-tweaked-1.21-core | < 1.119.0 | 1.119.0 |
| maven | cc.tweaked:cc-tweaked-1.20.1-core | < 1.119.0 | 1.119.0 |
| maven | cc.tweaked:cc-tweaked-1.20.4-core | < 1.119.0 | 1.119.0 |
| maven | cc.tweaked:cc-tweaked-1.20.5-core | < 1.119.0 | 1.119.0 |
| maven | cc.tweaked:cc-tweaked-1.20.6-core | < 1.119.0 | 1.119.0 |
| maven | cc.tweaked:cc-tweaked-1.19.3-core | < 1.119.0 | 1.119.0 |
| maven | cc.tweaked:cc-tweaked-1.19.4-core | < 1.119.0 | 1.119.0 |
| maven | cc.tweaked:cc-tweaked-1.20-core | < 1.119.0 | 1.119.0 |