Is CVE-2026-114716 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-114716 being exploited in the wild.

How severe is CVE-2026-114716?

High severity, with a CVSS score of 8.5, published 22 October 2026.

Which products and versions are affected?

Roundcube Webmail before 1.6.20; 1.7.0 to 1.7.4.

Is there a fix for CVE-2026-114716?

Yes: fixed in Roundcube Webmail 1.6.20, 1.7.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-114716 attacked?

It is attacked over the network.

Am I affected by CVE-2026-114716?

Check whether you run Roundcube Webmail at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-114716: Roundcube Webmail mail header injection in inline image data URI

CVE-2026-114716 · Severity: high · CVSS 8.5 · Published 2026-10-22

Roundcube Webmail is an email client that allows users to send and receive messages. A vulnerability in how it processes inline images allows authenticated attackers to inject arbitrary email headers into outgoing messages, potentially enabling mail spoofing or other mail-based attacks.

Technologies: Roundcube Webmail. Vendors: Roundcube.

Quick answers

Is CVE-2026-114716 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-114716 being exploited in the wild.
How severe is CVE-2026-114716?: High severity, with a CVSS score of 8.5, published 22 October 2026.
Which products and versions are affected?: Roundcube Webmail before 1.6.20; 1.7.0 to 1.7.4.
Is there a fix for CVE-2026-114716?: Yes: fixed in Roundcube Webmail 1.6.20, 1.7.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-114716 attacked?: It is attacked over the network.
Am I affected by CVE-2026-114716?: Check whether you run Roundcube Webmail at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: Roundcube Webmail 1.6.20, 1.7.5

Technical details

The rcmail_sendmail::extract_inline_images() function fails to validate the media type extracted from inline image data URIs, allowing CRLF injection into MIME headers. An authenticated attacker can inject arbitrary headers by crafting a data URI with newlines in the media type field. The fix validates media types using rcube_mime::is_mimetype_valid().

Affected products

Roundcube Webmail before 1.6.20; 1.7.0 to 1.7.4

Timeline

2026-10-22: disclosed
2026-10-19: patched

References

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