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Advisory record · GHSA-4h8q-hh2j-755w

BlenderMCP path traversal in download_polyhaven_asset allows arbitrary file writes

CVSS 6.0 MediumEPSS 0.0030 · 22nd percentile

Published by the GitHub Advisory Database at 24 Jul 2026, 15:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
blender-mcpPyPI<1.6.51.6.5
Identifiers
GHSA-4h8q-hh2j-755w · CVE-2026-66004 · PYSEC-2026-4203
Weakness (CWE)
CWE-22
Tags
Published
24 Jul 2026
Updated
15 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

BlenderMCP versions before 1.6.5 are vulnerable to path traversal in the download_polyhaven_asset method. An attacker who can perform a man-in-the-middle attack or inject prompts can supply traversal sequences in API response include keys, allowing arbitrary file writes that may lead to persistent code execution. Upgrade blender-mcp to version 1.6.5 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.0 Medium 4.0 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0030, the 22nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:08 UTC First seen by agentprime
  2. 31 Oct 2026, 14:08 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.