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

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-23 · updated 2026-10-29
• Weakness: CWE-400

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.

Affected products

• Part-DB-server: before 2.13.2

References

• https://github.com/Part-DB/Part-DB-server/releases/tag/v2.13.2
• https://github.com/Part-DB/Part-DB-server/security/advisories/GHSA-2whx-2cx7-qvq6
• https://github.com/Part-DB/Part-DB-server/security/advisories/GHSA-2whx-2cx7-qvq6

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