---
title: "CVE-2026-103764: Mooncake transfer engine - Remote Code Execution & Information Disclosure"
description: "Mooncake transfer engine < 0.3.13 contains an untrusted pointer dereference in ServerSession::readHeader, letting unauthenticated attackers read and write arbitrary process memory via TCP transport data port, exploit requires crafted SessionHeader with arbitrary addr and size values."
url: https://panop.io/threat-heartbeat/CVE-2026-103764/
---

# CVE-2026-103764 Mooncake transfer engine - Remote Code Execution & Information Disclosure

Mooncake transfer engine < 0.3.13 contains an untrusted pointer dereference in ServerSession::readHeader, letting unauthenticated attackers read and write arbitrary process memory via TCP transport data port, exploit requires crafted SessionHeader with arbitrary addr and size values.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.64% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-103764)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution, Information Disclosure, Data Tampering

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

2 October 2026

Updated

15 October 2026

Weakness

[CWE-822](https://cwe.mitre.org/data/definitions/822.html)

## Vendor fix

Update to version 0.3.13 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-103764](https://nvd.nist.gov/vuln/detail/CVE-2026-103764)
- [https://github.com/kvcache-ai/Mooncake/commit/a2933849417259e562fc9cbad63c618d464dfb2d](https://github.com/kvcache-ai/Mooncake/commit/a2933849417259e562fc9cbad63c618d464dfb2d)
- [https://github.com/kvcache-ai/Mooncake/issues/4441](https://github.com/kvcache-ai/Mooncake/issues/4441)
- [https://github.com/kvcache-ai/Mooncake/releases/tag/v0.3.13](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-via-tcp-transport](https://www.vulncheck.com/advisories/mooncake-transfer-engine-before-0.3.13-unauthenticated-arbitrary-memory-read-write-via-tcp-transport)
- [https://github.com/kvcache-ai/Mooncake](https://github.com/kvcache-ai/Mooncake)
- [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/blob/6041a609a8c3af35e778f70db344f145c2914980/mooncake-transfer-engine/src/transport/tcp_transport/tcp_transport.cpp#L209)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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