CVE-2026-114717
MEDIUMDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 23% of all known CVEs.
References
Related Vulnerabilities
Other CWE-99 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2019-6545 | High | 7.5 | 14% | - | - |
| CVE-2021-22879 | High | 8.8 | 5.0% | - | Fix |
| CVE-2016-8615 | Medium | 5.3 | 4.7% | - | Fix |
| CVE-2022-39369 | High | 8.0 | 2.4% | - | Fix |
| CVE-2017-5159 | Critical | 9.8 | 2.4% | - | - |
| CVE-2022-3774 | Medium | 5.4 | 1.5% | - | - |
Common questions
How do I fix CVE-2026-114717?
Upgrade roundcube on debian 13 to 1.6.20+dfsg-0+deb13u1 or later.
Is CVE-2026-114717 being actively exploited?
Not that we know of. CVE-2026-114717 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.30% is the estimated probability that it will be exploited in the next 30 days. That is higher than 23% of all scored CVEs.
How severe is CVE-2026-114717?
CVE-2026-114717 has a CVSS v3 base score of 4.0, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-114717 affect?
Published advisories record a fix for roundcube (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-114717
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-26.