# CVE-2026-109959: EspoCRM access control bypass in Note endpoint

Source: https://junglewise.ai/threats/cve-2026-109959-espocrm-4-0-0-before-10-0-7-contains-an-access-control  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-109959 · Severity: medium · CVSS 4.3 · Published 2026-10-13

EspoCRM is a customer relationship management (CRM) platform that manages business data including customer records and interactions. The vulnerability allows authenticated users to bypass field-level security restrictions and read sensitive audited field values they are not authorized to see by accessing individual stream notes. An attacker could exploit this to view restricted customer data, account history, or other sensitive business information through the REST API.

Technologies: [Espocrm](https://junglewise.ai/threats/technologies/espocrm). Vendors: [Espocrm](https://junglewise.ai/threats/vendors/espocrm).

## Quick answers

**Is CVE-2026-109959 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109959 being exploited in the wild.

**How severe is CVE-2026-109959?** Medium severity, with a CVSS score of 4.3, published 13 October 2026.

**Which products and versions are affected?** Espocrm 4.0.0 before 10.0.7.

**Is there a fix for CVE-2026-109959?** Yes: fixed in 10.0.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-109959 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-109959?** Check whether you run Espocrm 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 10.0.7

## Technical details

The vulnerability is an authorization bypass in the Note read endpoint (GET /Note/{id}) where the NoteAccessControl filter is not applied to audit data. Authenticated users with stream access to a parent record can request individual notes directly and recover the old and new values (data.attributes.was and became) of fields restricted by field-level security (FLS). The attack requires authentication and network access to the EspoCRM API, and only affects fields marked as audited.

## Affected products

- EspoCRM EspoCRM 4.0.0 before 10.0.7

## Timeline

- 2026-09-29: disclosed
- 2026-10-13: advisory

## References

- [https://github.com/espocrm/espocrm/security/advisories/GHSA-mr36-xx82-qf6h](https://github.com/espocrm/espocrm/security/advisories/GHSA-mr36-xx82-qf6h)
- [https://www.vulncheck.com/advisories/espocrm-4.0.0-before-10.0.7-field-level-security-bypass-via-note-read-endpoint](https://www.vulncheck.com/advisories/espocrm-4.0.0-before-10.0.7-field-level-security-bypass-via-note-read-endpoint)

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