CVE-2026-126813
Published:November 11, 2026
Updated:November 13, 2026
Roundcube Webmail before 1.6.21 and 1.7.x before 1.7.6 contains an IMAP command injection vulnerability that allows attackers to inject commands via CRLF in the _uid parameter when messages_cache is enabled. Attackers can lure logged-in victims into opening crafted GET links to mail/show or mail/get, executing IMAP commands that delete messages, change flags, or grant mailbox access via SETACL.
Affected Packages
https://github.com/roundcube/roundcubemail.git (GITHUB):
Affected version(s) >=v0.6-beta <1.6.21 || >=v1.0-beta <1.6.21 || >=0.7.4 <1.6.21 || >=1.0.0 <1.6.21Fix Suggestion:
Update to version 1.6.21https://github.com/roundcube/roundcubemail.git (GITHUB):
Affected version(s) >=1.7-beta <1.7.6Fix Suggestion:
Update to version 1.7.6roundcube/roundcubemail (PHP):
Affected version(s) >=1.7-beta <1.7.6Fix Suggestion:
Update to version 1.7.6Related Resources (10)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
ACTIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of CRLF Sequences
EPSS
Base Score:
1.06