CVE-2026-114716

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability. rcmail_sendmail::extract_inline_images() used the media type taken from an inline image data URI without validating it, so a remote authenticated attacker could inject arbitrary MIME part headers into the outgoing message by placing CRLF sequences in that media type. Upstream fixed this in the commit “Fix mail header injection via media type in an inline image data URI”, which validates the media type with rcube_mime::is_mimetype_valid().

• CWE-99

• https://bugs.debian.org/1151279
• https://github.com/roundcube/roundcubemail/commit/7f3cc9cacb16cb3ab047fe8e3cba81db2023cdfc
• https://github.com/roundcube/roundcubemail/commit/adb9b9b3fd43e30af1c166b79494726d89f828eb
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.20
• https://github.com/roundcube/roundcubemail/releases/tag/1.7.5
• https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5

Published

Oct 22, 2026

Last Modified

Oct 22, 2026

Status

Awaiting Analysis

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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