CVE-2026-33656
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.
- Score
- CVSS 3.1 9.1 Critical
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-04-22
- Last modified
- 2026-04-23
- Weaknesses
- CWE-22
Affected products
References
- https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x
