CVE-2026-114717
Medium
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.
SeverityMedium
CVSS4.0
Exploit probability—
Product
Roundcube Webmail
PublishedOct 22, 2026
First seenOct 22, 2026
Weakness typeCWE-99CWE-99
How to fix
Update
- roundcube webmail1.6.20, 1.7.5 or later
Patches
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| roundcube webmail | 1.6.0 ≤ v < 1.6.20, 1.7.0 ≤ v < 1.7.5 | 1.6.20, 1.7.5 |
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