GHSA-7PWQ-Q9JF-539H kobako Sandbox Escape: guest eval reaches host RCE via method_missing → public_send (any bound Service)

Summary A guest mruby script running inside the Kobako sandbox can execute arbitrary Ruby in the host process, fully escaping the sandbox. Details A host embeds bound "Service" objects that guest scripts call across the wasm boundary through the transport dispatcher. The dispatcher passed the...

kobako Sandbox Escape: guest eval reaches host RCE via method_missing → public_send (any bound Service)

Summary A guest mruby script running inside the Kobako sandbox can execute arbitrary Ruby in the host process, fully escaping the sandbox. Details A host embeds bound "Service" objects that guest scripts call across the wasm boundary through the transport dispatcher. The dispatcher passed the...