---
id: CVE-2026-15509
title: A vulnerability has been found in Leantime up to 3.8.0
summary: >-
  A vulnerability has been found in Leantime up to 3.8.0. This impacts the
  function editUser/addUser of the component JSON-RPC Endpoint. The manipulation
  of the argument role leads to improper authorization. The attack is possible
  to be ca…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-266
  - CWE-285
published: '2026-07-12'
updated: '2026-07-12'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-15509'
references:
  - url: >-
      https://bytium.com/insights/leantime-priv-escalation-vulnerability-low-priv-to-owner
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-15509'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/846167'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/377838'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/377838/cti'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-07-12T23:22:21.185Z'
epss: 0.00347
epssPercentile: 0.25621
---

## Overview

A vulnerability has been found in Leantime up to 3.8.0. This impacts the function editUser/addUser of the component JSON-RPC Endpoint. The manipulation of the argument role leads to improper authorization. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.