roundcube: Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability
CVE-2026-114725 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-114725, released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| roundcube · Debian 13.5 (trixie) | 1.6.20+dfsg-0+deb13u1 | DEBIAN-CVE-2026-114725 | Oct 24, 2026 |
| roundcube · Debian 14 | 1.6.20+dfsg-1 | DEBIAN-CVE-2026-114725 | Oct 24, 2026 |
| roundcubemail · Fedora 43 | 1.6.20-1.fc43 | FEDORA-2026-DB7E033531 | Nov 7, 2026 |
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