#VU124136 Deserialization of Untrusted Data in Roundcube Webmail

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Main Vulnerability Database Vulnerabilities #VU124136

#VU124136 Deserialization of Untrusted Data in Roundcube Webmail

Published: March 19, 2026


Vulnerability identifier: #VU124136
Vulnerability risk: Critical
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Red
CVE-ID: N/A
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Roundcube Webmail
Software vendor:
Roundcube

Description

The vulnerability allows a remote attacker to execute arbitrary code or write arbitrary files.

The vulnerability exists due to unsafe deserialization in redis/memcache session handler when processing session data. A remote attacker can send a specially crafted session payload to execute arbitrary code or write arbitrary files.

No authentication is required to exploit this vulnerability.


Remediation

Install security update from vendor's website.

External links