Security Vulnerability in EspoCRM by EspoCRM Tech
CVE-2026-33656

9.1CRITICAL

Key Information:

Vendor

Espocrm

Status
Espocrm
Vendor
CVE Published:
22 April 2026

What is CVE-2026-33656?

EspoCRM, an open source customer relationship management application, contains a vulnerability in its built-in formula scripting engine prior to version 9.3.4. This flaw allows an authenticated administrator to modify the sourceId field on Attachment entities. The vulnerability arises because sourceId is directly concatenated into a file path without proper sanitization in the EspoUploadDir::getFilePath() method. Consequently, this allows attackers to redirect file operations to arbitrary paths within the web server's access scope, potentially leading to unauthorized access to sensitive data or system compromise. Version 9.3.4 addresses and resolves this vulnerability.

Affected Version(s)

espocrm < 9.3.4

References

https://github.com/espocrm/espocrm/security/advisories/GH...
x_refsource_CONFIRM

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.