CVE-2026-103764
Mooncake transfer engine before 0.3.13 Unauthenticated Arbitrary Memory Read/Write via TCP Transport
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-822 |
| Vendor | kvcache-ai |
| Product | mooncake |
| Published | Oct 1, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
kvcache-ai / Mooncake
0 < 0.3.13
References
github.com: https://github.com/kvcache-ai/Mooncake/issues/4441 github.com: https://github.com/kvcache-ai/Mooncake/commit/a2933849417259e562fc9cbad63c618d464dfb2d github.com: https://github.com/kvcache-ai/Mooncake/releases/tag/v0.3.13 github.com: https://github.com/kvcache-ai/Mooncake/blob/6041a609a8c3af35e778f70db344f145c2914980/mooncake-transfer-engine/src/transport/tcp_transport/tcp_transport.cpp#L209 github.com: https://github.com/kvcache-ai/Mooncake vulncheck.com: https://www.vulncheck.com/advisories/mooncake-transfer-engine-before-0.3.13-unauthenticated-arbitrary-memory-read-write-via-tcp-transport
Credits
Mingkai Yu Jiajia Liu