High 7.1Published Oct 21, 2026

CVE-2026-114720Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an IMAP command injection vulnerability.

Updated under an hour ago (Oct 28, 2026, 7:00 AM ET)

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EPSS puts the chance of exploitation in the next 30 days at 0.81%, higher than 57% of scored CVEs.

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Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Weakness (CWE): CWE-93
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.81% (percentile 57)
Assigned by: mitre
NVD analysis: Undergoing Analysis
Record last updated: Oct 26, 2026
First seen by InfoSec Signals: Oct 21, 2026

Affected products

Affected products

Roundcube Webmail roundcube:webmail (from the name)	from 1.6.0 before 1.6.20; from 1.7.0 before 1.7.5	CNA record

References

References

https://bugs.debian.org/1151279	issue-tracking, third-party-advisory
https://github.com/roundcube/roundcubemail/commit/6c3c1897c11e193e47fccaabc87e9ca2a0a73e51	patch
https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5	vendor-advisory, release-notes
https://github.com/roundcube/roundcubemail/releases/tag/1.7.5	release-notes, patch
https://github.com/roundcube/roundcubemail/releases/tag/1.6.20	release-notes, patch
https://github.com/roundcube/roundcubemail/commit/242c6d6a150c850bd96d20d400261e71f8d11f9b	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.