CVE-2026-103761: Allocation of Resources Without Limits or Throttling in kvcache-ai Mooncake
CVE-2026-103761 is a high-severity memory exhaustion vulnerability in the kvcache-ai Mooncake transfer engine versions up to 0.3.13.post1. It allows unauthenticated attackers to send large notify frames repeatedly to the handshake RPC port, causing unbounded growth of an internal data structure and eventual out-of-memory termination of the process.
AI Analysis
Technical Summary
The vulnerability exists in the TransferMetadata::receivePeerNotify function of the Mooncake transfer engine through version 0.3.13.post1. Attackers can exploit this by sending notify frames up to 1 MB repeatedly to the handshake RPC port, which causes the uncapped 'notifys' vector to grow without limit. This leads to memory exhaustion and the termination of the engine by the out-of-memory killer. The flaw requires no authentication and has a CVSS 4.0 base score of 8.7, indicating high severity.
Potential Impact
Successful exploitation results in denial of service due to memory exhaustion, causing the Mooncake transfer engine process to be terminated. This disrupts normal operation of the affected software until it is restarted.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting access to the handshake RPC port to trusted sources to reduce exposure.
CVE-2026-103761: Allocation of Resources Without Limits or Throttling in kvcache-ai Mooncake
Description
CVE-2026-103761 is a high-severity memory exhaustion vulnerability in the kvcache-ai Mooncake transfer engine versions up to 0.3.13.post1. It allows unauthenticated attackers to send large notify frames repeatedly to the handshake RPC port, causing unbounded growth of an internal data structure and eventual out-of-memory termination of the process.
CVSS v4.0
Score 8.7high
Affected software
kvcache-ai
Mooncake
pkg:github/kvcache-ai/MooncakeRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in the TransferMetadata::receivePeerNotify function of the Mooncake transfer engine through version 0.3.13.post1. Attackers can exploit this by sending notify frames up to 1 MB repeatedly to the handshake RPC port, which causes the uncapped 'notifys' vector to grow without limit. This leads to memory exhaustion and the termination of the engine by the out-of-memory killer. The flaw requires no authentication and has a CVSS 4.0 base score of 8.7, indicating high severity.
Potential Impact
Successful exploitation results in denial of service due to memory exhaustion, causing the Mooncake transfer engine process to be terminated. This disrupts normal operation of the affected software until it is restarted.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting access to the handshake RPC port to trusted sources to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-01T10:39:47.845Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abee66fa43b0b3b890f1cf9
Added to database: 10/01/2026, 23:02:07 UTC
Last enriched: 10/01/2026, 23:16:01 UTC
Last updated: 10/02/2026, 00:15:31 UTC
Views: 7
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