CVE-2026-114726
mediumRoundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability in the Bounce (resend) action.
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability in the Bounce (resend) action. rcube_mime::decode_address_list() did not strip control characters from the decoded display name, so a received message whose From display-name carries CRLF sequences in an encoded word could inject arbitrary headers into the message emitted when the user bounces it. Upstream fixed this in the commit “Fix mail header injection via the From display-name in the Bounce (resend) action”.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://bugs.debian.org/1151279 cve@mitre.org
- https://github.com/roundcube/roundcubemail/commit/3a136465c965776a5f636587187626985dae4f3b cve@mitre.org
- https://github.com/roundcube/roundcubemail/commit/d3a35545fdaf72b02a9a4d670064895488e9d9d0 cve@mitre.org
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.20 cve@mitre.org
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.5 cve@mitre.org
- https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5 cve@mitre.org