Mail Search Vulnerability in Roundcube Webmail by Roundcube
CVE-2026-75002

7.1HIGH

Key Information:

Vendor

Roundcube

Status
Webmail
Vendor
CVE Published:
17 August 2026

What is CVE-2026-75002?

A vulnerability in Roundcube Webmail allows for mail search and LITERAL+ byte-count desynchronization. This can be exploited through IMAP command injection, potentially leading to unauthorized information disclosure or privilege escalation. Versions prior to 1.6.18 and 1.7.x before 1.7.3 are affected. Users are urged to update to the latest versions to mitigate the risks associated with this vulnerability.

Affected Version(s)

Webmail 1.6.0 < 1.6.18

Webmail 1.7.0 < 1.7.3

References

https://roundcube.net/news/2026/08/09/security-updates-1....
https://github.com/roundcube/roundcubemail/releases/tag/1...
https://github.com/roundcube/roundcubemail/commit/73233ab...

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.