CVE-2026-103761 Mooncake transfer engine through 0.3.13.post1 Memory Exhaustion via Unbounded Notify Queue
Unauthenticated attackers can exhaust memory by sending unlimited notify frames, causing the Mooncake transfer engine to crash via the out-of-memory killer.
- 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-2026-103761?
CVE-2026-103761 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 memory exhaustion vulnerability in TransferMetadata::receivePeerNotify that allows unauthenticated attackers to grow process memory without limit. Attackers can repeatedly send notify frames up to 1 MB to the handshake RPC port, filling the uncapped notifys vector until the out-of-memory killer terminates the engine.
Weakness: CWE-770
Which versions are affected by CVE-2026-103761?
How do I fix CVE-2026-103761?
No fix has been published for CVE-2026-103761 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-2026-103761 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-103761 exists.
Sources
Also known as GHSA-62mv-x7jm-w9f4.