by Kastro
Paper/Archive/CVE-2026-103765

CVE-2026-103765

kvcache-ai Mooncake — Mooncake through 0.3.13.post1 Missing Authentication in HTTP Metadata Server

EPSS 0.6%public exploitCVSS 9.4
critical.is priorityof 100
48
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 49.8.498 × 2010.0Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Mooncake≤ 0.3.13.post1–CNA

Scores by source

VulnCheck (CNA)9.4CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
VulnCheck (CNA)8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/kvcache-ai/Mooncake/issues/4444writeupgithub.com/kvcache-ai/Mooncake/blob/719735896c86b56fabec6cf3e825fb2ea640597a/mooncake-wheel/mooncake/http_metadata_server.py#L61-L106refgithub.com/kvcache-ai/Mooncakewriteupvulncheck.com/advisories/mooncake-through-0.3.13-post1-missing-authentication-in-http-metadata-server