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CVE-2026-103760
MEDIUM5.9
Published 2026-10-01 · Source disclosure@vulncheck.com
Description
Mooncake transfer engine through 0.3.13.post1 contains a denial of service vulnerability that allows unauthenticated remote attackers to block the handshake daemon by never reading replies. Attackers can send a Metadata request to the handshake RPC port and stall SocketHandShakePlugin's single listener thread in writeFully(), breaking all subsequent handshakes, metadata fetches, notify and probe requests.
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-400
References
- https://github.com/kvcache-ai/Mooncake
- https://github.com/kvcache-ai/Mooncake/blob/719735896c86b56fabec6cf3e825fb2ea640597a/mooncake-transfer-engine/src/transfer_metadata_plugin.cpp#L730-L803
- https://github.com/kvcache-ai/Mooncake/issues/4443
- https://www.vulncheck.com/advisories/mooncake-transfer-engine-through-0.3.13-post1-denial-of-service-via-p2p-handshake-daemon-response-write

