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Findings

GHSA-vv44-hjm2-qw2f

Duplicate Advisory: Remote code execution via unsafe deserialization in multiprocess mode transport

Published Oct 7, 2026 · corrected/updated Oct 16, 2026 · evidence confidence high

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-w5f2-9q9c-ff4h.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

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

GHSA-vv44-hjm2-qw2f is a critical public vulnerability record for this product. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether this product is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: lmcache (0.3.10, 0.3.10.post1, 0.3.10.post2); lmcache (from 0.3.9). Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 9.8. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-306. Sources contributing to this record: github, osv, pypa. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.

  • Patch and remediation

    No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 7, 2026 · GitHub Advisory Database

    Detected

    ## 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 p

  2. Oct 16, 2026 · GitHub Advisory Database

    Withdrawn

    The advisory was withdrawn.

  3. Oct 16, 2026 · GitHub Advisory Database

    Updated

    ## 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 p

Affected

  • PyPI lmcache0.3.10, 0.3.10.post1, 0.3.10.post2
  • PyPI lmcachefrom 0.3.9

Sources

References