CVE-2026-103765 Mooncake through 0.3.13.post1 Missing Authentication in HTTP Metadata Server
Unauthenticated attackers can read, modify, or delete metadata in Mooncake, enabling cache poisoning, redirection, or memory exhaustion.
- 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-2026-103765?
CVE-2026-103765 is a high-severity missing authorization 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 through 0.3.13.post1 contains a missing authentication vulnerability in the HTTP metadata server /metadata handler that allows unauthenticated attackers to read, overwrite, and delete transfer engine metadata keys. Attackers can poison segment descriptors such as tcp_data_port or re-create rpc_meta entries to redirect KV cache transfers to attacker-controlled listeners, or exhaust server memory.
Weakness: CWE-306
Which versions are affected by CVE-2026-103765?
How do I fix CVE-2026-103765?
No fix has been published for CVE-2026-103765 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-103765 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-103765 exists.
Sources
Also known as GHSA-3mpp-98wg-qvr5.