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CVE-2026-114720

7.1 · HIGH

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an IMAP command injection vulnerability.

Published Oct 22, 2026roundcubeCWE-93EPSS 0.79%

Overview

CVE-2026-114720 is a high-severity vulnerability affecting roundcube webmail. It was published on October 22, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from roundcube. Update webmail to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
roundcubewebmail>= 1.6.0, < 1.6.20Affected

References

Refbugs.debian.org/1151279GitHubgithub.com/roundcube/roundcubemail/commit/242c6d6a150c850bd96d20d400261e71f8d11f9bGitHubgithub.com/roundcube/roundcubemail/commit/6c3c1897c11e193e47fccaabc87e9ca2a0a73e51GitHubgithub.com/roundcube/roundcubemail/releases/tag/1.6.20GitHubgithub.com/roundcube/roundcubemail/releases/tag/1.7.5Refroundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5

How CyberStrike helps

Frequently asked questions

What is CVE-2026-114720?

CVE-2026-114720 is a high-severity vulnerability affecting roundcube webmail. It was published on October 22, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-114720?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-114720?

Check the references section for vendor advisories and patches from roundcube. Update webmail to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-114720?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-114720 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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