{"id":"CVE-2026-103764","published":"2026-10-02T00:16:59.253","lastModified":"2026-10-02T19:16:39.627","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.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-822"],"vendors":[],"products":[],"references":[{"url":"https://github.com/kvcache-ai/Mooncake","tags":[]},{"url":"https://github.com/kvcache-ai/Mooncake/blob/6041a609a8c3af35e778f70db344f145c2914980/mooncake-transfer-engine/src/transport/tcp_transport/tcp_transport.cpp#L209","tags":[]},{"url":"https://github.com/kvcache-ai/Mooncake/commit/a2933849417259e562fc9cbad63c618d464dfb2d","tags":[]},{"url":"https://github.com/kvcache-ai/Mooncake/issues/4441","tags":[]},{"url":"https://github.com/kvcache-ai/Mooncake/releases/tag/v0.3.13","tags":[]},{"url":"https://www.vulncheck.com/advisories/mooncake-transfer-engine-before-0.3.13-unauthenticated-arbitrary-memory-read-write-via-tcp-transport","tags":[]},{"url":"https://github.com/kvcache-ai/Mooncake/issues/4441","tags":[]}],"exploitRefs":[{"url":"https://github.com/kvcache-ai/Mooncake","tags":[]},{"url":"https://github.com/kvcache-ai/Mooncake/blob/6041a609a8c3af35e778f70db344f145c2914980/mooncake-transfer-engine/src/transport/tcp_transport/tcp_transport.cpp#L209","tags":[]},{"url":"https://github.com/kvcache-ai/Mooncake/commit/a2933849417259e562fc9cbad63c618d464dfb2d","tags":[]},{"url":"https://github.com/kvcache-ai/Mooncake/issues/4441","tags":[]},{"url":"https://github.com/kvcache-ai/Mooncake/releases/tag/v0.3.13","tags":[]},{"url":"https://github.com/kvcache-ai/Mooncake/issues/4441","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw in Mooncake transfer engine before 0.3.13 allows unauthenticated attackers to read and write arbitrary process memory, potentially disclosing sensitive information or leading to code execution.","exploitability":"Exploitation is relatively straightforward as it requires sending a crafted SessionHeader with specific opcodes. The attacker must have access to the TCP transport data port.","blast_radius":"If exploited, the impact could be severe, including the disclosure of sensitive KV cache contents, prompts, and secrets, or even code execution.","remediation":"Upgrade to Mooncake transfer engine 0.3.13 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","memory-disclosure","untrusted-pointer","tcp"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-02T08:45:10.782Z"}}