Authorization Flaw in Leantime's JSON-RPC API Exposes Sensitive User Data
CVE-2026-59712

8.6HIGH

Key Information:

Vendor

Leantime

Status
Leantime
Vendor
CVE Published:
6 July 2026

What is CVE-2026-59712?

Leantime's Users::getUser method within the JSON-RPC API is vulnerable due to inadequate authorization checks. This flaw allows authenticated users to access sensitive information, including complete user credential rows that contain password hashes, TOTP secrets, and session tokens. Attackers may exploit this vulnerability by invoking the users.getUser method with any arbitrary user ID, enabling them to enumerate accounts and extract credentials. This could potentially lead to offline password cracking, bypassing two-factor authentication (2FA), and session hijacking.

Affected Version(s)

Leantime 0 <= 3.4.4

References

https://github.com/Leantime/leantime/issues/3556
issue-tracking
https://github.com/Leantime/leantime
product
https://github.com/Leantime/leantime/commit/4f2612d13e0e8...
patch

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.