---
id: CVE-2026-103764
title: >-
  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
summary: >-
  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…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-822
vendor: kvcache-ai
product: Mooncake
affected:
  - Mooncake < 0.3.13
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T00:16:59.253'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103764'
references:
  - url: 'https://github.com/kvcache-ai/Mooncake'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/kvcache-ai/Mooncake/blob/6041a609a8c3af35e778f70db344f145c2914980/mooncake-transfer-engine/src/transport/tcp_transport/tcp_transport.cpp#L209
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/kvcache-ai/Mooncake/commit/a2933849417259e562fc9cbad63c618d464dfb2d
    label: disclosure@vulncheck.com
  - url: 'https://github.com/kvcache-ai/Mooncake/issues/4441'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/kvcache-ai/Mooncake/releases/tag/v0.3.13'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/mooncake-transfer-engine-before-0.3.13-unauthenticated-arbitrary-memory-read-write-via-tcp-transport
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T00:04:54.727Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.