LMCache multiprocess mode, also called distributed mode, opens an unauthenticated ZeroMQ…

LMCache

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.

Do this now

Upgrade lmcache to 0.5.6 and block network access to its ZeroMQ socket until upgraded.

Fix it

pip install --upgrade "lmcache>=0.5.6"

First seen: 1 Nov 2026
Last update: 1 Nov 2026, 20:17 UTC
Fixed in: lmcache 0.5.6
Identifiers: CVE-2026-105192
CVSS: 9.8
Source: news
On the menu as: PyPI packages

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## LMCache multiprocess mode, also called distributed mode, opens an unauthenticated ZeroMQ…
Severity: critical. Patch status: patched.
Affected: LMCache
Fixed in: lmcache 0.5.6
Ids: CVE-2026-105192

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.

## Steps
1. Search every lockfile and manifest (package-lock.json, yarn.lock, pnpm-lock.yaml, requirements*.txt, poetry.lock, uv.lock, composer.lock, go.sum, Cargo.lock, Gemfile.lock) for `lmcache`. For each hit, compare the installed version with the fix on the same major line: lmcache 0.5.6. If it's lower, give the exact upgrade command for the package manager this repo uses.

## Fix by release line
| Line | State | Fix | Until then |
|---|---|---|---|
| lmcache >= 0.3.9 < 0.5.6 | fixed | 0.5.6 | — |

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-105192") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://blog.lmcache.ai/en/2026/10/13/an-update-on-cve-2026-105192/ https://nvd.nist.gov/vuln/detail/CVE-2026-105192
https://pwned.coffee/i/lmcache-multiprocess-mode-also-called-distributed-mode-o-cve-2026-105192

Timeline

1 Nov 2026, 20:17 UTC
Fix status: unknown → patched.
1 Nov 2026
First reported.

Receipt

Exploitation: No known exploitation
Checked by hand “GitHub advisory GHSA-w5f2-9q9c-ff4h, its own text (read 2 Nov 2026): "Fixed in 0.5.6."” source
Fix by release line: Product Affected Fixed in Source
lmcache (pip) >= 0.3.9, < 0.5.6 0.5.6 Checked by hand checked 3 Nov
Score: CVSS 9.8 (critical). CVSS 3.1 9.8 (CNA JFROG) for CVE-2026-105192
Last checked: 4 Nov 2026, 08:18 UTC

Product	Affected	Fixed in	Source
lmcache (pip)	>= 0.3.9, < 0.5.6	0.5.6	Checked by hand checked 3 Nov

Sources: KEV – CVE record ✓ Vendor ✓

Sources

Totalone very hot coffee