Description
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, mail search and LITERAL+ byte-count desynchronization could lead to information disclosure or privilege escalation via IMAP command injection.
Affected products
roundcube: webmail
References5
- roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3 Vendor Advisory
- github.com/roundcube/roundcubemail/commit/404d43f1b0125319c3cf8… Patch
- github.com/roundcube/roundcubemail/commit/73233abe581b3b31cefd0… Patch
- github.com/roundcube/roundcubemail/releases/tag/1.6.18 Release Notes
- github.com/roundcube/roundcubemail/releases/tag/1.7.3 Release Notes
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L - EPSS — exploit probability
- 1% percentile: 72 · as of 11 November 2026
- CWE
- CWE-77
Could this be exploited in your environment?
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