CVE-2026-103760 Mooncake transfer engine through 0.3.13.post1 Denial of Service via P2P Handshake Daemon Response Write
Unauthenticated attackers can cause a denial of service in Mooncake transfer engine by stalling the handshake daemon, blocking all subsequent network operations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-103760?
CVE-2026-103760 is a high-severity denial of service vulnerability in kvcache-ai Mooncake, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-400
Which versions are affected by CVE-2026-103760?
How do I fix CVE-2026-103760?
No fix has been published for CVE-2026-103760 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-103760 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-103760 exists.
Sources
Also known as GHSA-mmqv-rpx9-mqhx.