CVE-2026-114717 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.
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114717?
CVE-2026-114717 is a medium-severity vulnerability in Roundcube Webmail, published on 22 Oct 2026.
Official description
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.
Weakness: CWE-99
Which versions are affected by CVE-2026-114717?
How do I fix CVE-2026-114717?
Upgrade to a fixed version.
Is CVE-2026-114717 being exploited?
There is no known exploitation of CVE-2026-114717 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-114717, GHSA-8246-wqv2-g48f, UBUNTU-CVE-2026-114717.