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CVE-2026-86018— Part-DB: Authenticated Disk Exhaustion via Unbounded Server-Side Attachment Downloads

Quick assessment

Affected
Part-DB Part-DB-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Part-DB 是一个用于电子元器件的开源库存管理系统。在 2.13.2 版本之前，当启用服务器端“下载外部文件”附件功能时，已认证用户可以绕过系统配置的附件文件大小上限。具体而言，当启用服务器端附件下载时，Part-DB 会从远程位置下载文件并直接将其流式写入磁盘，而未强制执行所配置的 限制。因此，任何拥有创建或编辑附件权限的已认证用户，均可导致 Part-DB 存储超过预设最大附件尺寸的文件，从而可能耗尽磁盘空间并引发拒绝服务（DoS）攻击。该问题已在 2.13.2 版本中修复。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-86018

Vulnerability Information
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Vulnerability Title
Part-DB: Authenticated Disk Exhaustion via Unbounded Server-Side Attachment Downloads
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Part-DB Part-DB-server < 2.13.2 -

II. Public POCs for CVE-2026-86018

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III. Intelligence Information for CVE-2026-86018

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Vendor Advisories for CVE-2026-86018 (1)

Vendor Pages for CVE-2026-86018 (1)

Same Patch Batch · Part-DB · 2026-10-23 · 9 CVEs total

CVE-2026-54630 9.6 CRITICAL Part-DB: Authenticated RCE via .phar attachment upload served from public/media
CVE-2026-86055 8.7 HIGH Part-DB: Password Reset Link Poisoning via Host Header Injection leads to pre-authenticati
CVE-2026-54631 6.3 MEDIUM Part-DB: Hardcoded APP_SECRET enables forged remember-me cookie
CVE-2026-54615 6.0 MEDIUM Part-DB: Stored XSS / HTML injection in activity-log Extra column via unsanitized Collecti
CVE-2026-55600 5.7 MEDIUM Part-DB: Stored HTML injection in BOM validation results via unescaped Part name
CVE-2026-59188 5.4 MEDIUM Part-DB: SVG Sanitization Bypass via Extension Spoofing Leads to Stored XSS in Attachment
CVE-2026-86019 5.3 MEDIUM Part-DB: Attachment Size Limit Bypass via API Base64 Upload
CVE-2026-86020 4.6 MEDIUM Part-DB: Spreadsheet Formula Injection in XLSX Part Exports

IV. Related Vulnerabilities

Same product: Part-DB-server
Same vendor: Part-DB
Same weakness: CWE-400

V. Comments for CVE-2026-86018

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