CVE-2026-33656

critical · 9.1

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.

9.1

CVSS

0.5%

EPSS (exploit prob.)

42nd

EPSS percentile

2026-04-22

Published

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-22

Affected products

Vendor	Product	Affected versions
espocrm	espocrm	< 9.3.4

Check a specific version with /api/v1/cve/match.

References

https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x
https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-33656