CVE-2026-105192
CVE-2026-105192 · LMCache Unauthenticated RCE in multiprocess mode via pickle deserialization
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 9.8 · Critical · EPSS 0.8% · Public exploit · Fix available
- Published
- Updated
Stack: python
Affected products and versions
lmcache
- Versions
- ≥ 0.3.9: Affected (python)
No fix published
lmcache PyPI
- Versions
- 0.3.10
- 0.3.10.post1
- 0.3.10.post2
- 0.3.11
- 0.3.12
- 0.3.13
- 0.3.14
- 0.3.15
- 0.3.9
- 0.3.9.post1
- 0.3.9.post2
- 0.4.1
- 0.4.2
- 0.4.3
- 0.4.4
- 0.4.5
- 0.4.6
- 0.4.7
- 0.4.8.dev38
- 0.4.8.dev42
- 0.4.8rc3
- 0.4.8rc4
- 0.5.0
- 0.5.0rc1
- 0.5.1
- 0.5.1rc1
- 0.5.1rc2
- 0.5.2
- 0.5.2rc1
- 0.5.3
- 0.5.3rc1
- 0.5.3rc2
- 0.5.3rc4
- 0.5.4
- 0.5.4rc1
- 0.5.4rc2
- 0.5.4rc3
- 0.5.4rc4
- 0.5.4rc5
- 0.5.5
- 0.5.5rc1
- 0.5.5rc2
- 0.5.5rc3
- 0.5.5rc4
- 0.5.5rc5
- 0.5.5rc6
- 0.5.5rc6.dev17
- 0.5.5rc7
- 0.5.6rc1
- 0.5.6rc2
- 0.5.6rc3
- 0.5.6rc4.dev27
- 0.5.6rc5
- Affected ranges
- ECOSYSTEM: ≥ 0.3.9, < 0.5.6
Update to 0.5.6