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Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability when a message is forwarded as an attachment. The subject of the forwarded message was used verbatim to generate the attachment name, so a received message whose subject contains CRLF sequences could inject arbitrary MIME part headers into the outgoing message. Upstream fixed this in the commit “Fix mail header injection via subject of a message forwarded as attachment”, which collapses whitespace in the generated name.
FEDORA-EPEL-2026-7597dbe701 (roundcubemail-1.6.20-1.el10_3) has been submitted as an update to Fedora EPEL 10.3. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-7597dbe701
FEDORA-EPEL-2026-6c045f4364 (roundcubemail-1.6.20-1.el10_4) has been submitted as an update to Fedora EPEL 10.4. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-6c045f4364
FEDORA-EPEL-2026-7012a089ec (roundcubemail-1.6.20-1.el10_2) has been submitted as an update to Fedora EPEL 10.2. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-7012a089ec
FEDORA-EPEL-2026-6c045f4364 (roundcubemail-1.6.20-1.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-EPEL-2026-7597dbe701 (roundcubemail-1.6.20-1.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-EPEL-2026-7012a089ec (roundcubemail-1.6.20-1.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository. If problem still persists, please make note of it in this bug report.