CVE-2026-103764

CVSS 9.8 (critical) · published 2026-10-02

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

Source: NVD CVE-2026-103764

References

• https://github.com/kvcache-ai/Mooncake
• https://github.com/kvcache-ai/Mooncake/blob/6041a609a8c3af35e778f70db344f145c2914980/mooncake-transfer-engine/src/transport/tcp_transport/tcp_transport.cpp#L209
• https://github.com/kvcache-ai/Mooncake/commit/a2933849417259e562fc9cbad63c618d464dfb2d
• https://github.com/kvcache-ai/Mooncake/issues/4441
• https://github.com/kvcache-ai/Mooncake/releases/tag/v0.3.13
• https://www.vulncheck.com/advisories/mooncake-transfer-engine-before-0.3.13-unauthenticated-arbitrary-memory-read-write-via-tcp-transport
• https://github.com/kvcache-ai/Mooncake/issues/4441

Check your software

Connect an AI agent to the FixLane MCP server or ask the Telegram bot to check what you have installed against incidents with a verified fixed version.