{"id":"CVE-2026-103764","state":"PUBLISHED","title":"Mooncake transfer engine before 0.3.13 Unauthenticated Arbitrary Memory Read/Write via TCP Transport","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.","publishedAt":"2026-10-01T23:19:57.849Z","updatedAt":"2026-10-02T18:22:06.535Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["kvcache-ai Mooncake"],"affected":[{"vendor":"kvcache-ai","product":"Mooncake","packageURL":"pkg:pypi/mooncake-transfer-engine","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.3.13","versionType":"custom"}]}],"references":["https://github.com/kvcache-ai/Mooncake/issues/4441","https://github.com/kvcache-ai/Mooncake/commit/a2933849417259e562fc9cbad63c618d464dfb2d","https://github.com/kvcache-ai/Mooncake/releases/tag/v0.3.13","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","https://www.vulncheck.com/advisories/mooncake-transfer-engine-before-0.3.13-unauthenticated-arbitrary-memory-read-write-via-tcp-transport"],"weaknesses":["CWE-822"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/103xxx/CVE-2026-103764.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-103764","state":"PUBLISHED","datePublished":"2026-10-01T23:19:57.849Z","dateUpdated":"2026-10-02T18:22:06.535Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-01T10:39:47.845Z"},"containers":{"cna":{"title":"Mooncake transfer engine before 0.3.13 Unauthenticated Arbitrary Memory Read/Write via TCP Transport","descriptions":[{"lang":"en","value":"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. 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