---
title: "CVE-2026-114716: Roundcube Webmail - Injection"
description: "Roundcube Webmail < 1.6.20 and 1.7.x < 1.7.5 contain a mail header injection caused by improper validation of media type in inline image data URI in rcmail_sendmail::extract_inline_images(), letting remote authenticated attackers inject arbitrary MIME headers, exploit requires authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-114716/
---

# CVE-2026-114716 Roundcube Webmail - Injection

Roundcube Webmail < 1.6.20 and 1.7.x < 1.7.5 contain a mail header injection caused by improper validation of media type in inline image data URI in rcmail\_sendmail::extract\_inline\_images(), letting remote authenticated attackers inject arbitrary MIME headers, exploit requires authentication.

CVSS base score 8.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.39% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-114716)

## Details

Type

Injection

Impact

Data Tampering

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N

Published

22 October 2026

Updated

23 October 2026

Weakness

[CWE-99](https://cwe.mitre.org/data/definitions/99.html)

## Vendor fix

Update to version 1.6.20 or 1.7.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-114716](https://nvd.nist.gov/vuln/detail/CVE-2026-114716)
- [https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5](https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5)
- [https://bugs.debian.org/1151279](https://bugs.debian.org/1151279)
- [https://github.com/roundcube/roundcubemail/commit/7f3cc9cacb16cb3ab047fe8e3cba81db2023cdfc](https://github.com/roundcube/roundcubemail/commit/7f3cc9cacb16cb3ab047fe8e3cba81db2023cdfc)
- [https://github.com/roundcube/roundcubemail/commit/adb9b9b3fd43e30af1c166b79494726d89f828eb](https://github.com/roundcube/roundcubemail/commit/adb9b9b3fd43e30af1c166b79494726d89f828eb)
- [https://github.com/roundcube/roundcubemail/releases/tag/1.6.20](https://github.com/roundcube/roundcubemail/releases/tag/1.6.20)
- [https://github.com/roundcube/roundcubemail/releases/tag/1.7.5](https://github.com/roundcube/roundcubemail/releases/tag/1.7.5)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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