GHSA-vv44-hjm2-qw2f: Duplicate Advisory: Remote code execution via unsafe deserialization in multiprocess mode transport
This advisory was withdrawn on Oct 16, 2026. The publisher no longer considers it a valid vulnerability.
Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-w5f2-9q9c-ff4h. This link is maintained to preserve external references. Original Description 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.
Published Oct 7, 2026 · Updated Oct 16, 2026
Affected packages
lmcache
- Ecosystem
- PyPI
- Affected
- >= 0.3.9, < 0.5.6
- Fixed in
- No patched version yet
- Check
pip show lmcache
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-w5f2-9q9c-ff4h. This link is maintained to preserve external references.
Original Description
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.
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-105192
- https://github.com/LMCache/LMCache
- https://github.com/LMCache/LMCache/blob/v0.3.9/lmcache/v1/multiprocess/custom_types.py
- https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/platform/base/ipc_wrapper.py
- https://pypi.org/project/lmcache
- https://github.com/advisories/GHSA-vv44-hjm2-qw2f
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology