CVE-2026-75002 Command injection in Webmail

What is CVE-2026-75002?

CVE-2026-75002 is a high-severity command injection vulnerability in Roundcube Webmail, published on 17 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-77

Which versions are affected by CVE-2026-75002?

It affects 1 product.

Products include Roundcube Webmail.

How do I fix CVE-2026-75002?

Upgrade to a fixed version.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2026-75002 being exploited?

There is no known exploitation of CVE-2026-75002 in the wild and no public exploit code.

Other vulnerabilities in Roundcube Webmail

• CVE-2024-42009 RoundCube Webmail Cross-Site Scripting Exploited Critical 9.3
• CVE-2025-68461 RoundCube Webmail Cross-site Scripting Exploited High 7.2
• CVE-2008-5619 PHPMailer susceptible to arbitrary code execution Critical 10.0
• CVE-2024-37385 Command injection in n/a Critical 9.8
• CVE-2024-42008 Cross-site scripting in n/a Critical 9.3

All Roundcube Webmail vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-75002, GHSA-m462-3x7r-5r7f, UBUNTU-CVE-2026-75002.