CVE-2026-33656

CriticalCVSS 9.1/10Last modified Nov 11, 2026

Description

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.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-22

Affected software

VendorProductVersions
espocrmespocrm< 9.3.4

References

Timeline

Published
Apr 22, 2026
Last modified
Nov 11, 2026
NVD status
Analyzed

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CVE-2026-33656: Critical severity, CVSS 9.1 | Vulnix