CVE-2026-107145

CVE-2026-107145

The twofactor_gauthenticator plugin for Roundcube is vulnerable to brute-forcing of the second-factor code. Due to the lack of rate limiting, an attacker who obtains user's password can submit arbitrary 6-digit codes, resulting in second-factor bypass and unauthorized access to the system. This issue was fixed in commit 4640889.

Published 2026-10-27 · last modified 2026-10-27.

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.

Weakness classification (CWE)

CWE-307 — Improper Restriction of Excessive Authentication Attempts

References

cert.pl/en/posts/2026/10/CVE-2026-107145 (third-party-advisory)
github.com/alexandregz/twofactor_gauthenticator/blob/master/CHANGES-2FA-SECURIT… (patch)