CVE-2026-103764 Mooncake transfer engine before 0.3.13 Unauthenticated Arbitrary Memory Read/Write via TCP Transport
Unauthenticated attackers can read or write arbitrary process memory via crafted TCP packets, potentially disclosing secrets or executing code.
- 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-2026-103764?
CVE-2026-103764 is a critical memory corruption 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 before 0.3.13 contains an untrusted pointer dereference in ServerSession::readHeader that allows unauthenticated attackers to read and write arbitrary process memory via the TCP transport data port. Attackers can send a crafted SessionHeader with arbitrary addr and size values using READ or WRITE opcodes to disclose KV cache contents, prompts and secrets or corrupt memory toward code execution.
Weakness: CWE-822
Which versions are affected by CVE-2026-103764?
How do I fix CVE-2026-103764?
No fix has been published for CVE-2026-103764 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-103764 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-103764 exists.
Sources
Also known as GHSA-mp8g-r7h2-5x36.