CVE-2026-114725
CVSS Score
5.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-99 |
| Vendor | roundcube |
| Product | webmail |
| Published | Oct 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
Roundcube / Webmail
1.6.0 < 1.6.20 1.7.0 < 1.7.5
References
bugs.debian.org: https://bugs.debian.org/1151279 github.com: https://github.com/roundcube/roundcubemail/commit/acd32a86f631dd6dcda8ac3ec7bd9ba4d4c0c117 roundcube.net: https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.7.5 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.6.20 github.com: https://github.com/roundcube/roundcubemail/commit/79adcfc0c48012bbbe930278471425027fd7331c