CVE-2026-54418

Received Received - Intake

Two-Factor Authentication Bypass in Leantime

Publication date: 2026-08-05

Last updated on: 2026-08-10

Assigner: TuranSec

Description

Leantime through 3.6.2 exposes the JSON-RPC methods leantime.rpc.TwoFA.TwoFA.getSetupData, saveSecret, verifyAndEnable, and disable2FA, which act on a caller-supplied userId parameter with no ownership check, session pinning, or permission-attribute gate (unlike other RPC-exposed methods in the same dispatcher).

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-05

Last Modified

2026-08-10

Generated

2026-08-18

AI Q&A

2026-08-05

EPSS Evaluated

2026-08-17

NVD

CVE-2026-54418

EUVD

EUVD-2026-53193

Affected Vendors & Products

Vendor	Product	Version / Range
leantime	leantime	to 3.6.2 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability in Leantime through 3.6.2 allows authenticated users to bypass two-factor authentication (2FA) protections. It exposes JSON-RPC methods that manipulate user accounts without proper authorization checks. Attackers can read another user's TOTP secret or disable their 2FA entirely, fully defeating account-level 2FA protection.

Detection Guidance

Check Leantime's JSON-RPC endpoints for unauthorized access to userId parameters. Monitor logs for suspicious calls to methods like getSetupData, saveSecret, verifyAndEnable, or disable2FA with arbitrary userId values. Ensure no unauthorized modifications to 2FA settings are detected.

Impact Analysis

If exploited, this vulnerability could allow unauthorized access to user accounts, bypassing 2FA protections. Attackers could gain control of accounts, access sensitive data, or perform actions on behalf of other users. This undermines account security and could lead to data breaches or unauthorized system changes.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and access controls. Organizations using Leantime may fail to meet compliance standards due to insufficient security measures, risking legal penalties and reputational damage.

Mitigation Strategies

Update Leantime to the latest version beyond 3.6.2. Review and restrict access to JSON-RPC endpoints. Implement session pinning and permission checks for all RPC methods. Disable or audit userId parameter manipulation in TwoFA-related methods.

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