CVE-2026-107146 PUBLISHED

The twofactor_gauthenticator plugin for Roundcube is vulnerable to session persistence after failed 2FA verification. Due to the lack of server-side session destruction, an attacker can ignore the logout redirect and keep the session alive. This may allow an attacker who obtains user's password to e.g. brute force the second-factor code.

This issue was fixed in commit 4640889.

• Marek Figielski (Vanilla.pl) finder

• https://cert.pl/en/posts/2026/10/CVE-2026-107145
• https://github.com/alexandregz/twofactor_gauthenticator/blob/master/CHANGES-2FA-SECURITY.en.md

• CWE-613 Insufficient session expiration CWE

• CAPEC-112 Brute Force