Medium severity · published Oct 1, 2026
CVE-2026-103760
Mooncake transfer engine through 0.3.13.post1 Denial of Service via P2P Handshake Daemon Response Write
5.9
CVSS
0.5%
EPSS
No
On KEV
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
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Mooncake · kvcache-ai
through 0.3.13.post1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103760
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103760
issue-tracking
https://github.com/kvcache-ai/Mooncake/issues/4443
technical-description
https://github.com/kvcache-ai/Mooncake/blob/719735896c86b56fabec6cf3e825fb2ea640597a/mooncake-transfer-engine/src/transfer_metadata_plugin.cpp#L730-L803
product
https://github.com/kvcache-ai/Mooncake
third-party-advisory
https://www.vulncheck.com/advisories/mooncake-transfer-engine-through-0.3.13-post1-denial-of-service-via-p2p-handshake-daemon-response-write
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