# CVE-2026-86020: Part-DB spreadsheet formula injection in XLSX export

Source: https://junglewise.ai/threats/cve-2026-86020-part-db-is-an-open-source-inventory-management-system-for  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-23. Updated: 2026-10-23  
License: CC BY 4.0 with a link back

CVE-2026-86020 · Severity: medium · CVSS 4.6 · Published 2026-10-23

Part-DB is an open source inventory management system for electronic components. An authenticated user with import permissions can inject spreadsheet formulas (like =1+1) through CSV import, which are then written unescaped into exported XLSX files. When another user opens the exported spreadsheet, the embedded formula executes in their spreadsheet software, potentially allowing code execution or data theft depending on the spreadsheet application's capabilities.

Technologies: [Part-DB](https://junglewise.ai/threats/technologies/part-db-part-db). Vendors: [Part-DB](https://junglewise.ai/threats/vendors/part-db).

## Quick answers

**Is CVE-2026-86020 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-86020 being exploited in the wild.

**How severe is CVE-2026-86020?** Medium severity, with a CVSS score of 4.6, published 23 October 2026.

**Which products and versions are affected?** Part-DB prior to 2.13.2.

**Is there a fix for CVE-2026-86020?** Yes: fixed in 2.13.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-86020 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-86020?** Check whether you run Part-DB at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2.13.2

## Technical details

A formula injection vulnerability exists in the part import/export workflow. Authenticated users can import CSV files with formula-prefixed values into part fields; during XLSX export, Part-DB serializes these values and writes them via PhpSpreadsheet's setCellValue() without neutralizing formula characters (=, +, -, @), resulting in executable formulas in the exported file. Attack requires user authentication with import permission and victim interaction (opening the exported file).

## Affected products

- Part-DB Part-DB prior to 2.13.2

## Timeline

- 2026-07-19: disclosed
- 2026-07-16: patched: Version 2.13.2 released

## References

- [https://github.com/Part-DB/Part-DB-server/releases/tag/v2.13.2](https://github.com/Part-DB/Part-DB-server/releases/tag/v2.13.2)
- [https://github.com/Part-DB/Part-DB-server/security/advisories/GHSA-hxw4-frfg-f8jw](https://github.com/Part-DB/Part-DB-server/security/advisories/GHSA-hxw4-frfg-f8jw)

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