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Vulnerability record · CVE-2026-103764 · published 2 October 2026

CVE-2026-103764: Mooncake transfer engine before 0.3.13 contains an untrusted pointer dereference in ServerSession::readHeader …

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.

9.3 CVSS 4.0 Critical EPSS 0.64% · top 51.3% CWE-822 · CWE-822 Deferred
9.3CVSS 4.0 base score
0.64%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
2 Oct 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/kvcache-ai/Mooncake
https://github.com/kvcache-ai/Mooncake/blob/6041a609a8c3af35e778f70db344f145c2914980/mooncake-transfer-engine/src/transp
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-
https://github.com/kvcache-ai/Mooncake/issues/4441

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Source: NIST National Vulnerability Database (record CVE-2026-103764), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.