CVE-2026-114720 Roundcube Webmail - Command Injection

Roundcube Webmail < 1.6.20 and 1.7.x < 1.7.5 contains an IMAP command injection caused by CRLF sequences in the _flag parameter of mail/mark action, letting remote authenticated attackers execute arbitrary IMAP commands.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.80% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Published
22 October 2026
Updated
23 October 2026
Weakness
CWE-93

Vendor fix

Update to version 1.6.20 or 1.7.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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