CVE-2026-114725 Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability.

What is CVE-2026-114725?

CVE-2026-114725 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. 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.

Weakness: CWE-99

Which versions are affected by CVE-2026-114725?

It affects 1 product.

Products include Roundcube Webmail.

How do I fix CVE-2026-114725?

Upgrade to a fixed version.

Is CVE-2026-114725 being exploited?

There is no known exploitation of CVE-2026-114725 in the wild and no public exploit code.

Other vulnerabilities in Roundcube Webmail

• CVE-2024-42009 RoundCube Webmail Cross-Site Scripting Exploited Critical 9.3
• CVE-2025-68461 RoundCube Webmail Cross-site Scripting Exploited High 7.2
• CVE-2008-5619 PHPMailer susceptible to arbitrary code execution Critical 10.0
• CVE-2024-37385 Command injection in n/a Critical 9.8
• CVE-2024-42008 Cross-site scripting in n/a Critical 9.3

All Roundcube Webmail vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-114725, GHSA-wc9x-qc4f-7pj3, UBUNTU-CVE-2026-114725.