CVE
CVE-2026-33656
EspoCRM vulnerable to authenticated RCE via Formula with path traversal in attachment `sourceId`, exploitable by admin user
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.
Package Versions Affected
Package Version
patch Availability
No items found.
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
C
H
U
-
Related Resources
No items found.
References
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33656.json, https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x, https://nvd.nist.gov/vuln/detail/CVE-2026-33656