# CVE-2026-33656: EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, EspoCRM's built-in…

Source: https://junglewise.ai/threats/cve-2026-33656-espocrm-is-an-open-source-customer-relationship-management  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-22  
License: CC BY 4.0 with a link back

CVE-2026-33656 · Severity: critical · CVSS 9.1 · Published 2026-04-22

EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, EspoCRM's built-in formula scripting engine allowing updating attachment's sourceId thus allowing an authenticated admin to overwrite the `sourceId` field on `Attachment` entities. Because `sourceId` is concatenated directly into a file path with no sanitization in `EspoUploadDir::getFilePath()`, an attacker can redirect any file read or write operation to an arbitrary path within the web server's `open_basedir` scope. Version 9.3.4 fixes the issue.

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

## Quick answers

**Is CVE-2026-33656 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33656 being exploited in the wild.

**How severe is CVE-2026-33656?** Critical severity, with a CVSS score of 9.1, published 22 April 2026.

**Which products and versions are affected?** Espocrm. The advisory does not name versions.

**Is there a fix for CVE-2026-33656?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-33656?** Check whether you run Espocrm. 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.

## Affected products

- Espocrm

## Related threats

- [EspoCRM denial of service in password-redaction regex](https://junglewise.ai/threats/cve-2026-118686-espocrm-before-9-3-11-and-10-x-before-10-0-8-contains-a-denial)
- [EspoCRM authorization bypass in PDF image rendering](https://junglewise.ai/threats/cve-2026-113643-a-vulnerability-was-found-in-espocrm-up-to-9-3-10-10-0-10-this)
- [EspoCRM mass-update attachment access control bypass](https://junglewise.ai/threats/cve-2026-75505-espocrm-is-an-open-source-customer-relationship-management)
- [EspoCRM HTML injection in email notifications](https://junglewise.ai/threats/cve-2026-59994-espocrm-is-an-open-source-customer-relationship-management)
- [EspoCRM CSV/XLSX formula injection via whitespace bypass](https://junglewise.ai/threats/cve-2026-55154-espocrm-is-an-open-source-customer-relationship-management)