CVE-2026-104433

Mooncake before 0.3.12 Out-of-Bounds Read via P2P Handshake readString

State: Published
Severity: 8.7 High
Published: Oct 2, 2026
Updated: Oct 5, 2026
Reserved: Oct 2, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	VulnCheck

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
Mooncakekvcache-ai	before 0.3.12Affected 0.3.12Not affected

References

GitHub Issue #4452issue-tracking
https://github.com/kvcache-ai/Mooncake/commit/c142b40590259360196d8e504b2193382529e7b4patch
https://github.com/kvcache-ai/Mooncakeproduct
VulnCheck Advisory: Mooncake before 0.3.12 Out-of-Bounds Read via P2P Handshake readStringthird-party-advisory

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