CVE-2026-114720
Published:October 22, 2026
Updated:October 22, 2026
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an IMAP command injection vulnerability. A remote authenticated attacker can exploit this via CRLF sequences injected into the _flag parameter of the mail/mark action to execute arbitrary IMAP commands. Upstream fixed this in the commit “Fix IMAP command injection via CRLF in "_flag" parameter of mail/mark action”, which rejects flags containing control, whitespace and IMAP-special characters.
Affected Packages
https://github.com/roundcube/roundcubemail.git (GITHUB):
Affected version(s) >=1.6-beta <1.6.20Fix Suggestion:
Update to version 1.6.20https://github.com/roundcube/roundcubemail.git (GITHUB):
Affected version(s) >=1.7-beta <1.7.5Fix Suggestion:
Update to version 1.7.5roundcube/roundcubemail (PHP):
Affected version(s) >=1.7-beta <1.7.5Fix Suggestion:
Update to version 1.7.5Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of CRLF Sequences ('CRLF Injection')
EPSS
Base Score:
0.80