Vulnerability in Alexandregz Twofactor Gauthenticator
CVE-2026-107147
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.
Published · last modified .
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- cert.pl/en/posts/2026/10/CVE-2026-107145 (third-party-advisory)
- github.com/alexandregz/twofactor_gauthenticator/blob/master/CHANGES-2FA-SECURIT… (patch)