SEPTEMBER 17, 2026
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Case File

CVE-2026-55758

MEDIUM · CVSS 6.9 EPSS 0.43% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-27 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

The vulnerability affects the CC: Tweaked mod for Minecraft, specifically in its SSRF protection, which fails to block the RFC 8215 64:ff9b:1::/48 local-use prefix. This oversight allows unauthenticated users executing Lua code to access sensitive internal resources, including loopback and cloud metadata endpoints, potentially leading to unauthorized data exposure. Users of the mod prior to version 1.120.0 should prioritize updating to mitigate this security risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-55758
Severity
MEDIUM
CVSS
6.9
EPSS
0.43%
Java

Original NVD Description

CC: Tweaked is a mod for Minecraft which adds programmable computers, turtles, and more to the game. Prior to 1.120.0, the SSRF protection in projects/core/src/main/java/dan200/computercraft/core/apis/http/options/AddressPredicate.java blocks the RFC 6052 64:ff9b::/96 NAT64 prefix but omits the RFC 8215 64:ff9b:1::/48 local-use prefix. On a dual-stack server using RFC 8215 NAT64, an unauthenticated user who can execute Lua code can use http.request or http.websocket with an address under 64:ff9b:1::/48 to reach loopback, RFC 1918, cloud metadata, or internal API endpoints because PrivatePattern.matches() does not classify the mapped IPv6 address as private. This issue is fixed in version 1.120.0.