CVE-2026-40187

In egroupware version 26.0 and earlier, an authenticated administrator can achieve OS-level Remote Code Execution (RCE) by uploading a malicious eTemplate XML file (`.xet`) to the VFS `/etemplates` mount. The `Widget::expand_name()` method passes template widget attribute values directly into a PHP `eval()` call with only double-quote escaping applied - **backtick characters are not escaped**. In PHP, backticks inside a double-quoted `eval()` string execute shell commands. This allows an admin-level user to escalate from web application access to arbitrary OS command execution on the server.

CVSS

No CVSS.

References

Link	Resource
https://github.com/EGroupware/egroupware/security/advisories/GHSA-8737-2x9g-xjj7
https://github.com/EGroupware/egroupware/security/advisories/GHSA-8737-2x9g-xjj7

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-20 17:17

Updated : 2026-07-23 18:04

NVD link : CVE-2026-40187

Mitre link : CVE-2026-40187

CVE.ORG link : CVE-2026-40187

JSON object : View

Products Affected

No product.

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE-95

Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

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