CVE-2026-103765CWE-306

CVE-2026-103765

Critical · published October 2, 2026

CVSS v3.1
9.4
EPSS
1%
Percentile
41.9
In the wild
Unconfirmed
What it is

Mooncake through 0.3.13.post1 contains a missing authentication vulnerability in the HTTP metadata server /metadata handler that allows unauthenticated attackers to read, overwrite, and delete transfer engine metadata keys. Attackers can poison segment descriptors such as tcp_data_port or re-create rpc_meta entries to redirect KV cache transfers to attacker-controlled listeners, or exhaust server memory.

The record
Technical detail
CVSS v3.1
9.4 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
CVSS v4.0
8.8 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N
EPSS
0.00500 · 41.9th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-10-02T04:16Z
References (5)
https://github.com/kvcache-ai/Mooncake · [email protected]https://github.com/kvcache-ai/Mooncake/blob/719735896c86b56fabec6cf3e825fb2ea640597a/mooncake-wheel/mooncake/http_metadata_server.py#L61-L106 · [email protected]https://github.com/kvcache-ai/Mooncake/issues/4444 · [email protected]https://www.vulncheck.com/advisories/mooncake-through-0.3.13-post1-missing-authentication-in-http-metadata-server · [email protected]https://github.com/kvcache-ai/Mooncake/issues/4444 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 1%
    epss
  • 01 OCT 23:19Z
    Mooncake through 0.3.13.post1 Missing Authentication in HTTP Metadata Server
    cvelistv5