CC-Tweaked up to 1.119.x SSRF Protection AddressPredicate.java PrivatePattern.matches server-side request forgery

Summaryinfo

A vulnerability was found in CC-Tweaked up to 1.119.x and classified as critical. This vulnerability affects the function PrivatePattern.matches of the file projects/core/src/main/java/dan200/computercraft/core/apis/http/options/AddressPredicate.java of the component SSRF Protection. Such manipulation leads to server-side request forgery. This vulnerability is traded as CVE-2026-55758. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in CC-Tweaked up to 1.119.x. Affected by this issue is the function PrivatePattern.matches of the file projects/core/src/main/java/dan200/computercraft/core/apis/http/options/AddressPredicate.java of the component SSRF Protection. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-55758 since 06/17/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

Upgrading to version 1.120.0 eliminates this vulnerability.

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Productinfo

Name

• CC-Tweaked

Version

• 1.119

Website

• Product: https://github.com/cc-tweaked/CC-Tweaked/

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