---
id: "CVE-2026-86018"
kind: "vulnerability"
aliases: ["CVE-2026-86018"]
title: "Part-DB: external file download skips attachment size limit, enabling disk exhaustion"
severity: "medium"
cvss: 5.3
epss: 0.00272
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "part-db", "php", "self-hosted"]
not_affected_if: ["no-untrusted-accounts", "server-side-downloads-disabled", "version-2.13.2-or-later"]
published_at: "2026-10-23T05:17:18+00:00"
first_seen_at: "2026-10-23T21:57:32+00:00"
updated_at: "2026-10-25T04:19:00+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86018", "first_seen_at": "2026-10-23T21:57:32+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-86018", "first_seen_at": "2026-10-24T07:15:51+00:00"}]
---

# Part-DB: external file download skips attachment size limit, enabling disk exhaustion

Part-DB, an inventory system for electronic components, has a server-side 'Download external file' attachment feature that streams remote files to disk without checking MAX_ATTACHMENT_FILE_SIZE. An authenticated user who can create or edit attachments can fill the server's disk and cause a denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Part-DB version and compare it with `2.13.2`.
- Look for `MAX_ATTACHMENT_FILE_SIZE` and whether server-side external attachment downloads are enabled in the configuration.

## Fix

- Upgrade Part-DB to `2.13.2` or later.

## Timeline

- 2026-10-23T21:57:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-86018
- 2026-10-24T07:15:51+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-86018

## From the sources

Part-DB is an open source inventory management system for electronic components. Prior to version 2.13.2, Part-DB allows authenticated users to bypass the configured maximum attachment file size when using the server-side “Download external file” attachment feature. When server-side attachment downloads are enabled, Part-DB downloads the remote file and streams it directly to disk without enforcing the configured MAX_ATTACHMENT_FILE_SIZE limit. As a result, an authenticated user who can create or edit attachments can cause Part-DB to store files larger than the configured maximum attachment size, potentially exhausting disk space and causing a denial of service. This issue has been patched in version 2.13.2.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_