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.
Advisories

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Fixes

Solution

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Workaround

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History

Thu, 22 Oct 2026 01:45:00 +0000

Type Values Removed Values Added
Description 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.
First Time appeared Roundcube
Roundcube webmail
Weaknesses CWE-93
CPEs cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
Vendors & Products Roundcube
Roundcube webmail
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-10-22T01:32:44.426Z

Reserved: 2026-10-22T01:32:44.065Z

Link: CVE-2026-114720

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-22T02:16:59.717

Modified: 2026-10-22T02:16:59.717

Link: CVE-2026-114720

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses