High severity · published Oct 2, 2026
CVE-2026-104433
Mooncake before 0.3.12 Out-of-Bounds Read via P2P Handshake readString
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
Mooncake transfer engine before 0.3.12 contains an out-of-bounds read vulnerability in the readString function of include/common.h that allows unauthenticated attackers to crash the service by sending a zero-length handshake frame. Attackers can connect to the handshake port listening on all interfaces and send an eight-byte frame to terminate the hosting process, such as an SGLang inference server.
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
before 0.3.12 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-104433
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-104433
issue-tracking
https://github.com/kvcache-ai/Mooncake/issues/4452
patch
https://github.com/kvcache-ai/Mooncake/commit/c142b40590259360196d8e504b2193382529e7b4
product
https://github.com/kvcache-ai/Mooncake
third-party-advisory
https://www.vulncheck.com/advisories/mooncake-before-0.3.12-out-of-bounds-read-via-p2p-handshake-readstring
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