Quick answers
- Is CVE-2026-103761 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-103761 being exploited in the wild.
- How severe is CVE-2026-103761?
- High severity, with a CVSS score of 7.5, published 1 October 2026.
- Which products and versions are affected?
- Moonshot AI Mooncake transfer engine through 0.3.13.post1.
- Is there a fix for CVE-2026-103761?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-103761 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-103761?
- 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.
Technical details
The vulnerability exists in the TransferMetadata::receivePeerNotify function, which stores incoming notify frames in an uncapped vector without enforcing size limits. An attacker can repeatedly send up to 1 MB notify frames over the network, causing the vector to grow until the process runs out of memory and is terminated by the out-of-memory killer. No authentication is required to exploit this.
Affected products
- Moonshot AI Mooncake transfer engine through 0.3.13.post1
Timeline
- 2026-10-01: disclosed