CVE-2026-103765: Kvcache-Ai Mooncake

Critical severity, CVSS 9.4. EPSS: 0.5% chance of exploitation in the next 30 days.

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. Attackers can poison segment descriptors such as tcp_data_port or re-create rpc_meta entries to redirect KV cache transfers to attacker-controlled listeners, or exhaust server memory.

Affected products

• Kvcache-Ai Mooncake: up to and including 0.3.13.post1

Published 2026-10-02. Last modified 2026-10-02.