CVE-2026-96763

Mooncake through 0.3.13.post1 contains a missing authentication vulnerability in the Store REST service, which binds to 0.0.0.0 without authentication on any route. Unauthenticated attackers can call routes such as /api/get, /api/put, /api/remove_all and /api/mount to read cached KV data with user prompts, inject or delete objects, and mount attacker-described segments.

Mooncake through 0.3.13.post1 contains a missing authentication vulnerability in the HTTP metadata server /metadata handler that allows unauthenticated attackers to read, overwrite, and delete transfer engine metadata keys. They can poison segment descriptors or re-create rpc_meta entries to redirect KV cache transfers to attacker-controlled listeners, or exhaust server memory.

Mooncake transfer engine before 0.3.13 contains an untrusted pointer dereference in ServerSession::readHeader that allows unauthenticated attackers to read and write arbitrary process memory via the TCP transport data port. They can send a crafted SessionHeader with arbitrary addr and size values using READ or WRITE opcodes to disclose KV cache contents, prompts and secrets or corrupt memory toward code execution.

Mooncake transfer engine before 0.3.12 contains an out-of-bounds read vulnerability in the readString function of include/common.h that allows unauthenticated attackers to crash the service by sending a zero-length handshake frame. Attackers can connect to the handshake port listening on all interfaces and send an eight-byte frame to terminate the hosting process, such as an SGLang inference server.

Mooncake transfer engine through 0.3.13.post1 contains a memory exhaustion vulnerability in TransferMetadata::receivePeerNotify that allows unauthenticated attackers to grow process memory without limit. Attackers can repeatedly send notify frames up to 1 MB to the handshake RPC port, filling the uncapped notifys vector until the out-of-memory killer terminates the engine.

A vulnerability was found in kvcache-ai mooncake up to version 0.3.12/0.3.14-rc1 in the MasterService::GetReplicaListByRegex function. Performing a manipulation leads to allocation of resources. The attack may be performed remotely and the exploit has been made public.

A vulnerability was determined in kvcache-ai mooncake up to 0.3.12/0.3.13.post1 in the UnmountSegment function of the RPC Path Handler component. Manipulation of the client_id/segment_id arguments causes authorization bypass. Remote exploitation is possible and the exploit has been publicly disclosed.