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2026-10-17 21:56 CEST · Intelligence refreshed (Europe/Stockholm)

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Latest synchronized CVE
CVSS 4.3 Published 2026-10-17 21:00 CEST
Vendor
Affected products
1 affected products/devices 1 software
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CVSS 9.8/10 Critical severity

First published: 7 October 2026, 11:40 CEST · Last modified: 7 October 2026, 19:48 CEST

CVE lookup — correlated security and lifecycle intelligence

· 8 sources correlated

Critical severity — prioritize remediation

LMCache Unauthenticated RCE in multiprocess mode via pickle deserialization

SeverityCVSS 9.8Critical · Remote / network
ExploitationNone reportedEPSS 0.5% chance in 30 days
Affected products6 products6 softwareEvidence8 sourcesindependent intelligence collections

Why this rating

  • It can be exploited remotely over the network.
  • Weakness type: Missing authentication (CWE-306), Unsafe deserialization (CWE-502).
  • Rated critical (CVSS 9.8); no exploitation is reported in current sources.

What to do

  1. Check your inventory against the 6 affected products — start with internet-facing systems.
Vendor
Affected products
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Affected products (examples)

Click to open the full list
LMCache LMCachepythonPyPIECOSYSTEMpkg:pypi/lmcacheAll 6 →

What the vulnerability is

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 con…

Detailed evidence Everything below supports the summary above. Open only what you need.

Matched intelligence coverage 8 sources
EUVD Vulnrichment GHSA OSV EPSS CWE CVE Affected Products
Cross-source correlations 8 matched lanes

Direct intelligence-source relationships

Direct intelligence-source lanes: every lane below has direct evidence for

in that Scantide intelligence collection. Lanes share the CVE as their join key; their presence together does not imply that one source explicitly referenced another source's record.

8 matched source lanes
ENISA EUVD CISA Vulnrichment GitHub Advisory OSV EPSS MITRE CWE · 2 CVE / NVD catalog Affected products/devices · 6
Downstream affected vendors 1 vendors

Affected vendor/product relationships

These vendors are derived from affected product/device evidence tied to this CVE. This is intentionally separate from the direct intelligence-source lanes above: a vendor can have affected products without Scantide having a vendor-specific advisory or Microsoft KB record for the CVE.

 1 affected vendors represented

Affected software, operating systems, hardware and devices 6

Deduplicated across Scantide's structured CVE, NVD applicability, CSAF, vendor advisory, campaign and downstream product evidence. Taxonomy IDs and evidence-only identifiers are excluded from the asset count. Counts represent relationships Scantide can currently prove, not the theoretical maximum downstream ecosystem.

6Software / applications
NVD/CVE catalog 1CISA Vulnrichment 3GitHub Advisory 3Osv 4
Expand all affected categories (6) How can this affect my environment?
Software (6 — click to show all)
Vendor: LMCache
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: NVD/CVE catalog — structured affected recordCorroborated: NVD/CVE catalogCorroborated: CISA Vulnrichment — structured affected recordCorroborated: GitHub Advisory — structured affected recordCorroborated: CISA VulnrichmentCorroborated: GitHub AdvisoryCorroborated: Osv — structured affected recordCorroborated: Osvhigh confidence
Vendor: LMCache
Software Affected range: version 0.3.9 — through * inclusive Product-associated Assertion
Primary: CISA Vulnrichment — structured affected recordhigh confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: CISA Vulnrichmentmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: GitHub AdvisoryCorroborated: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: GitHub AdvisoryCorroborated: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
What each source says 3
European vulnerability intelligence: ENISA EUVD cross-reference: EUVD-2026-94261.
Exploit probability: Estimated exploitation probability 0.48% — percentile 40.2%.
Vulnerability summary: LMCache Unauthenticated RCE in multiprocess mode via pickle deserialization
GitHub package advisories 1
LMCache: Remote code execution via unsafe deserialization in multiprocess mode transport
GitHub Advisory
GHSA-W5F2-9Q9C-FF4H Published 2026-10-16T20:08:44Z Updated 2026-10-16T20:09:10Z

### Summary LMCache is vulnerable to Unauthenticated Remote Code Execution via Pickle Deserialization on the Multiprocess ZMQ Transport ### Details LMCache multiprocess mode, also called distributed mode, opens an unauthenticated ZeroMQ ROUTER so worker processes can register and share KV cache blocks. The intended clients are sibling LMCache processes. There is no CURVE, ZAP, password, or message authentication on that socket. LMCache used only inside a vLLM process does not open this port. The transport binds to localhost unless the operator sets a routable address with --host, which is how multi-node deployments let peers connect. The 9.8 score is for that routable configuration. A stock single-host install that leaves the default bind is not reachable from other machines. Messages on the socket are msgpack. Extension code 1 is registered for DeviceIPCWrapper and is passed to DeviceIPCWrapper.Deserialize in lmcache/v1/platform/base/ipc_wrapper.py, which calls pickle.loads. That hoo…

GHSA-W5F2-9Q9C-FF4H
Related products
Read full advisory Open GitHub advisory or evidenceOpen NVD recordOpen GitHub advisory or evidenceOpen GitHub advisory or evidenceOpen GitHub advisory or evidenceOpen GitHub advisory or evidence
OSV advisories 1
LMCache: Remote code execution via unsafe deserialization in multiprocess mode transport
OSV
GHSA-w5f2-9q9c-ff4h CRITICAL Published 2026-10-16T20:08:44Z Updated 2026-10-16T20:15:03.732682699Z

### Summary LMCache is vulnerable to Unauthenticated Remote Code Execution via Pickle Deserialization on the Multiprocess ZMQ Transport ### Details LMCache multiprocess mode, also called distributed mode, opens an unauthenticated ZeroMQ ROUTER so worker processes can register and share KV cache blocks. The intended clients are sibling LMCache processes. There is no CURVE, ZAP, password, or message authentication on that socket. LMCache used only inside a vLLM process does not open this port. The transport binds to localhost unless the operator sets a routable address with --host, which is how multi-node deployments let peers connect. The 9.8 score is for that routable configuration. A stock single-host install that leaves the default bind is not reachable from other machines. Messages on the socket are msgpack. Extension code 1 is registered for DeviceIPCWrapper and is passed to DeviceIPCWrapper.Deserialize in lmcache/v1/platform/base/ipc_wrapper.py, which calls pickle.loads. That hoo…

GHSA-W5F2-9Q9C-FF4H
Related products
  • PyPI / lmcache — ECOSYSTEM: introduced 0.3.9, fixed 0.5.6
    pkg:pypi/lmcache
Read full advisory Open GitHub advisory or evidenceOpen GitHub advisory or evidenceOpen NVD recordOpen GitHub advisory or evidenceOpen GitHub advisory or evidenceOpen GitHub advisory or evidence
Evidence coverage

Correlated from multiple vulnerability, exploitation, advisory, package and affected-product intelligence collections.

Technical query coverage · 16 collections queried · 1 CVEs correlated
2026-10-17 21:56 CESTIntelligence refreshed
1unique CVEs queried and enriched
1unique CVEs correlated to this result
2unique advisories correlated
16intelligence collections queried
Affected-product scope: The product/device count is the deduplicated set Scantide can prove from its currently ingested structured records and advisory text. It is not a claim that only those products were affected; component vulnerabilities such as Log4Shell can have a much larger downstream ecosystem. Advisory and vendor references are kept clickable so additional downstream exposure can be followed to the authoritative source.
Coverage note: Scantide correlates multiple public and locally indexed intelligence sources, but no dataset or matching process is complete. Results may omit software, dependencies, affected versions or advisories, and related records do not by themselves prove that a specific installation is vulnerable. Confirm important findings against vendor guidance and the installed product and version.