LMCache up to 0.3.9 Multiprocess Mode pickle.loads deserialization

Summaryinfo

A vulnerability described as very critical has been identified in LMCache up to 0.3.9. Impacted is the function pickle.loads of the component Multiprocess Mode. Executing a manipulation can lead to deserialization. This vulnerability appears as CVE-2026-105192. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in LMCache up to 0.3.9 and classified as very critical. This vulnerability affects the function pickle.loads of the component Multiprocess Mode. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-105192 since 10/04/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/07/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• LMCache

Version

• 0.3.0
• 0.3.1
• 0.3.2
• 0.3.3
• 0.3.4
• 0.3.5
• 0.3.6
• 0.3.7
• 0.3.8
• 0.3.9

CPE 2.3info

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CPE 2.2info

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