Medium · CVSS 6.3CVE-2026-107145

Lack of rate-limiting in 2fa code check mechanism in twofactor_gauthenticatorCVE-2026-107145

Answer in brief

CVE-2026-107145 records a Medium severity (CVSS 6.3) vulnerability in Lack of rate-limiting in 2fa code check mechanism in twofactor_gauthenticator. The current sources do not mark it as known exploited. The current feed maps alexandregz/twofactor_gauthenticator (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps alexandregz/twofactor_gauthenticator (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
alexandregz/twofactor_gauthenticatorgeneric	>=0 <4640889	4640889

Recommended response

Check inventory. Check lockfiles and deployed manifests for alexandregz/twofactor_gauthenticator.
Review the reported fix. Update alexandregz/twofactor_gauthenticator to 4640889 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 27, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.