Medium 5.0Published Oct 21, 2026

CVE-2026-114725Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability.

Updated under an hour ago (Oct 28, 2026, 10:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for Roundcube Webmail

Exploited in the last 30 days

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability. rcmail_sendmail stripped newline characters only from the Subject and Organization headers, leaving other header values taken from request parameters unsanitized, so a remote authenticated attacker could inject arbitrary headers into an outgoing message via the References, In-Reply-To, Message-ID and From parameters. Upstream fixed this in the commit “Fix mail header injection via References/In-Reply-To/Message-ID/From parameters”, which normalizes whitespace in every string header value.

CVSS: 5.0 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
Weakness (CWE): CWE-99
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
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/acd32a86f631dd6dcda8ac3ec7bd9ba4d4c0c117	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/79adcfc0c48012bbbe930278471425027fd7331c	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.