Resource exhaustion in Kvcache-Ai Mooncake
CVE-2026-103760
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.
Vulnerability class: DoS (Denial of Service)
Published .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/kvcache-ai/Mooncake/issues/4443 (issue-tracking)
- github.com/kvcache-ai/Mooncake/blob/719735896c86b56fabec6cf3e825fb2ea640597a/mo… (technical-description)
- github.com/kvcache-ai/Mooncake (product)
- www.vulncheck.com/advisories/mooncake-transfer-engine-through-0.3.13-post1-deni… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103760?
- CVE-2026-103760 is a medium-severity vulnerability in Kvcache-Ai Mooncake, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2026-10-01.
- How severe is CVE-2026-103760?
- Medium severity. CVSS v3 base score is 5.9 out of 10.