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.
Metrics
Affected Vendors & Products
References
History
Thu, 22 Oct 2026 06:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Mail Header Injection in Roundcube Webmail |
Thu, 22 Oct 2026 02:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| First Time appeared |
Roundcube
Roundcube webmail |
|
| Weaknesses | CWE-99 | |
| CPEs | cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Roundcube
Roundcube webmail |
|
| References |
|
|
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: mitre
Published: 2026-10-22T01:52:10.894Z
Updated: 2026-10-22T01:52:10.894Z
Reserved: 2026-10-22T01:52:10.528Z
Link: CVE-2026-114725
No data.
Status : Awaiting Analysis
Published: 2026-10-22T02:17:00.493
Modified: 2026-10-22T16:45:49.550
Link: CVE-2026-114725
No data.