CVE-2026-107147

Authentication bypass by spoofing in twofactor_gauthenticator

Published Oct 27, 2026 CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Authentication bypass by spoofing in twofactor_gauthenticator
First Time appeared Alexandregz
Alexandregz twofactor Gauthenticator
Weaknesses CWE-290
CPEs cpe:2.3:a:alexandregz:twofactor_gauthenticator:*:*:*:*:*:*:*:*
Vendors & Products Alexandregz
Alexandregz twofactor Gauthenticator
References
Metrics cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
CERT-PL
Published
Updated
Nov 4, 2026, 2:58 PM
Reserved
Oct 7, 2026, 8:44 AM
Status
Awaiting Analysis
Published
Oct 27, 2026, 10:16 AM
Modified
Nov 4, 2026, 3:17 PM