High severity · published Oct 1, 2026
CVE-2026-103761
Mooncake transfer engine through 0.3.13.post1 Memory Exhaustion via Unbounded Notify Queue
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
Mooncake transfer engine through 0.3.13.post1 contains a memory exhaustion vulnerability in TransferMetadata::receivePeerNotify that allows unauthenticated attackers to grow process memory without limit. Attackers can repeatedly send notify frames up to 1 MB to the handshake RPC port, filling the uncapped notifys vector until the out-of-memory killer terminates the engine.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Mooncake · kvcache-ai
through 0.3.13.post1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103761
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103761
issue-tracking
https://github.com/kvcache-ai/Mooncake/issues/4445
technical-description
https://github.com/kvcache-ai/Mooncake/blob/719735896c86b56fabec6cf3e825fb2ea640597a/mooncake-transfer-engine/src/transfer_metadata.cpp#L285-L296
product
https://github.com/kvcache-ai/Mooncake
third-party-advisory
https://www.vulncheck.com/advisories/mooncake-transfer-engine-through-0.3.13-post1-memory-exhaustion-via-unbounded-notify-queue
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