[ CVE-2026-107147 · Published 27 Oct 2026 ]
Vulnerability in alexandregz twofactor_gauthenticator
CVSS 6.3
EPSS <1%No fix listed yet
[ Description ]Official description
The twofactor_gauthenticator plugin for Roundcube is vulnerable to 2fa authentication bypass by spoofed client address headers. Due to the lack of validation of the Client-IP and X-Forwarded-For headers, an attacker who obtains user's password can spoof a whitelisted IP address, resulting in the second factor being bypassed. This issue was fixed in commit 4640889.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.