# CVE-2026-109665: Frappe ERPNext missing authorization in deactivation endpoints

Source: https://junglewise.ai/threats/cve-2026-109665-frappe-erpnext-before-15-108-0-and-16-x-before-16-18-0-contains  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-109665 · Severity: medium · CVSS 4.3 · Published 2026-10-12

Frappe ERPNext is an open-source enterprise resource planning system used to manage business operations and customer relations. Authenticated users with limited permissions can exploit a missing authorization check to deactivate master records—such as customers, suppliers, or products—that they should not have access to modify, potentially disrupting business operations or data integrity.

Technologies: [Frappe ERPNext](https://junglewise.ai/threats/technologies/erpnext). Vendors: [Frappe](https://junglewise.ai/threats/vendors/frappe).

## Quick answers

**Is CVE-2026-109665 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109665 being exploited in the wild.

**How severe is CVE-2026-109665?** Medium severity, with a CVSS score of 4.3, published 12 October 2026.

**Which products and versions are affected?** Frappe ERPNext before 15.108.0 and 16.x before 16.18.0.

**Is there a fix for CVE-2026-109665?** Yes: fixed in ERPNext 15.108.0, 16.18.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-109665 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-109665?** Check whether you run Frappe ERPNext 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 ERPNext 15.108.0, 16.18.0

## Technical details

The vulnerability is a missing authorization check (CWE-862) in certain endpoints that deactivate master records. An authenticated user with low privileges can call these endpoints without proper role-based access control, allowing unauthorized modification of data beyond their assigned permissions. The attack requires network access and valid credentials but no user interaction; a fix is available in versions 15.108.0 and 16.18.0.

## Affected products

- Frappe ERPNext before 15.108.0 and 16.x before 16.18.0

## Timeline

- 2026-08-13: disclosed
- 2026-10-12: advisory

## References

- [https://github.com/frappe/erpnext/security/advisories/GHSA-j57j-p235-x5mx](https://github.com/frappe/erpnext/security/advisories/GHSA-j57j-p235-x5mx)
- [https://www.vulncheck.com/advisories/frappe-erpnext-before-15.108.0-missing-authorization-allows-master-record-deactivation](https://www.vulncheck.com/advisories/frappe-erpnext-before-15.108.0-missing-authorization-allows-master-record-deactivation)

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