GHSA-vv44-hjm2-qw2f: Duplicate Advisory Remote Code Execution Vulnerability

CRITICAL
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CVSS 9.8
CWE-306
Published
Advisory Summary

GHSA-vv44-hjm2-qw2f is a CRITICAL (CVSS 9.8) remote code execution vulnerability (CWE-306: Missing Authentication for Critical Function) affecting Duplicate Advisory libraries in the PyPI ecosystem. The issue involves remote code execution via unsafe deserialization in multiprocess mode transport. Remediation is available in the latest vendor maintenance releases.

GHSA-vv44-hjm2-qw2f at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-vv44-hjm2-qw2f
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-306: Missing Authentication for Critical Function
Affected Product Duplicate Advisory
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix GHSA-vv44-hjm2-qw2f

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

lmcache fixed: Latest secure release 
pip install lmcache>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show lmcache

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-vv44-hjm2-qw2f, inspect your installed packages using pip:

pip show lmcache

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show lmcache command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-306: Missing Authentication for Critical Function, where the product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## 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.

GHSA-vv44-hjm2-qw2f Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
lmcache
pypi/lmcache
PyPI
≥ 0.3.9

References

NVD — GHSA-vv44-hjm2-qw2f NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105192
Duplicate Advisory Source Repository REPOSITORY
https://github.com/LMCache/LMCache
Duplicate Advisory Source Repository REPOSITORY
https://github.com/LMCache/LMCache/blob/v0.3.9/lmcache/v1/multiprocess/custom_types.py
Duplicate Advisory Source Repository REPOSITORY
https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/platform/base/ipc_wrapper.py
pypi.org/project/lmcache WEB
https://pypi.org/project/lmcache

Frequently Asked Questions

What is GHSA-vv44-hjm2-qw2f?
GHSA-vv44-hjm2-qw2f is a security vulnerability in Duplicate Advisory involving Remote code execution via unsafe deserialization in multiprocess mode transport under CWE-306: Missing Authentication for Critical Function.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: lmcache.
What version fixes GHSA-vv44-hjm2-qw2f?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is lmcache affected?
Yes, lmcache is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-vv44-hjm2-qw2f?
GHSA-vv44-hjm2-qw2f has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with GHSA-vv44-hjm2-qw2f?
GHSA-vv44-hjm2-qw2f is classified under CWE-306: Missing Authentication for Critical Function (The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.).
How can I check PyPI dependencies for GHSA-vv44-hjm2-qw2f?
Run the dependency tree command: 'pip show lmcache'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vv44-hjm2-qw2f",
  "modified" : "2026-10-16T20:08:50Z",
  "published" : "2026-10-07T12:31:58Z",
  "withdrawn" : "2026-10-16T20:08:50Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Remote code execution via unsafe deserialization in multiprocess mode transport",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-w5f2-9q9c-ff4h. This link is maintained to preserve external references.\n\n## Original Description\nLMCache 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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "lmcache"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.3.9"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 0.5.6"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-105192"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/LMCache/LMCache"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/LMCache/LMCache/blob/v0.3.9/lmcache/v1/multiprocess/custom_types.py"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/platform/base/ipc_wrapper.py"
  }, {
    "type" : "WEB",
    "url" : "https://pypi.org/project/lmcache"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-306" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-16T20:08:50Z",
    "nvd_published_at" : "2026-10-07T10:17:32Z"
  }
}