CVE-2026-35537
Published:April 03, 2026
Updated:May 16, 2026
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.
Affected Packages
https://github.com/roundcube/roundcubemail.git (GITHUB):
Affected version(s) >=1.6.0 <1.6.14Fix Suggestion:
Update to version 1.6.14https://github.com/roundcube/roundcubemail.git (GITHUB):
Affected version(s) >=1.5.0 <1.5.14Fix Suggestion:
Update to version 1.5.14roundcube/roundcubemail (PHP):
Affected version(s) >=1.7-beta <1.7-rc5Fix Suggestion:
Update to version 1.7-rc5Related Resources (10)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Deserialization of Untrusted Data
EPSS
Base Score:
0.03