LMCache Unauthenticated RCE in multiprocess mode via pickle deserialization
LMCache multiprocess mode, also called distributed mode, opens an unauthenticated ZeroMQ ROUTER so worker processes can register and share KV cache blocks. Messages on that socket are msgpack. Extension code 1 is passed to DeviceIPCWrapper.Deserialize, which calls pickle.loads, while the server is still decoding request arguments and before the handler runs. A single unauthenticated ZMQ DEALER message to the transport port (default 5555) therefore executes code as the user the LMCache process runs as. Official container images run that process as root. The transport binds to localhost unless the operator sets a routable address with --host, which is how multi-node deployments let peers connect.
CVE-2026-105192
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-105192
LMCache
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "git://github.com/LMCache/LMCache",
"vendor": "LMCache",
"product": "LMCache",
"versions": [
{
"status": "affected",
"version": "0.3.9",
"versionType": "python",
"lessThanOrEqual": "*"
}
],
"packageName": "lmcache",
"programFiles": [
"lmcache/v1/multiprocess/transport/zmq_impl/mq.py",
"lmcache/v1/multiprocess/mq.py",
"lmcache/v1/multiprocess/custom_types.py",
"lmcache/v1/platform/base/ipc_wrapper.py",
"lmcache/v1/platform/base_ipc_wrapper.py"
],
"collectionURL": "https://pypi.org/project/lmcache/",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-105192
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #12060 · Revision 1
- Added to Heist Feed
- Publisher date