---
id: GHSA-vv44-hjm2-qw2f
title: >-
  Duplicate Advisory: Remote code execution via unsafe deserialization in
  multiprocess mode transport
summary: >-
  Duplicate Advisory: Remote code execution via unsafe deserialization in
  multiprocess mode transport
severity: critical
cvss: 9.8
cwe:
  - CWE-306
vendor: lmcache
product: lmcache
ecosystem: pip
affected:
  - 'lmcache >= 0.3.9, < 0.5.6'
published: '2026-10-07'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T20:08:51Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-vv44-hjm2-qw2f'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105192'
  - url: 'https://github.com/LMCache/LMCache'
  - url: >-
      https://github.com/LMCache/LMCache/blob/v0.3.9/lmcache/v1/multiprocess/custom_types.py
  - url: >-
      https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/platform/base/ipc_wrapper.py
  - url: 'https://pypi.org/project/lmcache'
  - url: 'https://github.com/advisories/GHSA-vv44-hjm2-qw2f'
tags:
  - ghsa
  - pip
ingestedAt: '2026-10-16T20:51:39.883Z'
---

## Overview

## 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This advisory has been withdrawn because it is a duplicate of GHSA-w5f2-9q9c-ff4h.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.

## Affected packages

- `lmcache >= 0.3.9, < 0.5.6`

## Remediation

Refer to the advisory for the patched release.