CVE-2026-107147

CVSS 6.3 (medium) · published 2026-10-27

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.

Weakness: CWE-290

Source: NVD CVE-2026-107147

References

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

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