Is CVE-2026-107147 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-107147 being exploited in the wild.

How severe is CVE-2026-107147?

Informational severity, published 27 October 2026.

Which products and versions are affected?

Alexandregz Twofactor Gauthenticator before commit 4640889.

Is there a fix for CVE-2026-107147?

Yes: fixed in commit 4640889. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-107147 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-107147?

Check whether you run Alexandregz Twofactor Gauthenticator at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-107147: twofactor_gauthenticator plugin for Roundcube authentication bypass via header spoofing

CVE-2026-107147 · Severity: info · Published 2026-10-27

The twofactor_gauthenticator plugin for Roundcube is a two-factor authentication add-on that verifies user identity before allowing email access. An attacker who has obtained a user's password can bypass the second authentication factor by forging network header information (Client-IP and X-Forwarded-For) to make the system think the login is coming from a trusted location. This allows unauthorized access to user email accounts.

Technologies: Alexandregz Twofactor Gauthenticator. Vendors: Alexandregz.

Quick answers

Is CVE-2026-107147 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-107147 being exploited in the wild.
How severe is CVE-2026-107147?: Informational severity, published 27 October 2026.
Which products and versions are affected?: Alexandregz Twofactor Gauthenticator before commit 4640889.
Is there a fix for CVE-2026-107147?: Yes: fixed in commit 4640889. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-107147 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-107147?: Check whether you run Alexandregz Twofactor Gauthenticator at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: commit 4640889

Technical details

The plugin fails to validate the Client-IP and X-Forwarded-For HTTP headers when checking whether a client IP address is whitelisted, allowing header spoofing to bypass 2FA. An attacker with valid credentials can craft requests with forged headers matching a whitelisted IP to skip the second authentication factor. The vulnerability was fixed in commit 4640889.

Affected products

alexandregz twofactor_gauthenticator before commit 4640889

Timeline

2026-10-27: disclosed

References

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