CVE-2026-103765

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.

  • Published Oct 2, 2026
  • CVSS 8.8 high
  • 0.5% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-103765 at the National Vulnerability Database