Is CVE-2026-104433 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-104433 being exploited in the wild.

How severe is CVE-2026-104433?

High severity, with a CVSS score of 7.5, published 3 October 2026.

Which products and versions are affected?

Moonshot AI Mooncake transfer engine before 0.3.12.

Is there a fix for CVE-2026-104433?

Yes: fixed in 0.3.12. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-104433 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-104433?

Check whether you run Moonshot AI Mooncake transfer engine at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-104433: Mooncake transfer engine out-of-bounds read in readString

CVE-2026-104433 · Severity: high · CVSS 7.5 · Published 2026-10-03

Mooncake transfer engine is a component used to serve AI models like Kimi LLM. An unauthenticated attacker can crash the service by sending a specially crafted zero-length handshake frame to the listening port, causing denial of service to dependent inference servers.

Vendors: Moonshot AI.

Quick answers

Is CVE-2026-104433 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-104433 being exploited in the wild.
How severe is CVE-2026-104433?: High severity, with a CVSS score of 7.5, published 3 October 2026.
Which products and versions are affected?: Moonshot AI Mooncake transfer engine before 0.3.12.
Is there a fix for CVE-2026-104433?: Yes: fixed in 0.3.12. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-104433 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-104433?: Check whether you run Moonshot AI Mooncake transfer engine at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 0.3.12

Technical details

The readString function in include/common.h fails to validate frame length before buffer access, allowing an out-of-bounds read when zero-length handshake frames are received. The vulnerability is unauthenticated and requires only network access to the handshake port; sending an eight-byte frame triggers a crash of the hosting process.

Affected products

Moonshot AI Mooncake transfer engine before 0.3.12

Timeline

2026-10-03: disclosed
2026-10-03: patched: Fix included guard on readString against zero-length network input

References

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