---
id: CVE-2026-109119
title: >-
  Improper Privilege Management in the user management API endpoint
  (/api/users/{username_or_id}) in Rdiffweb allows authenticated users to
  elevate their privileges to administrator by modifying the role parameter in a
  POST request.
summary: >-
  Improper Privilege Management in the user management API endpoint
  (/api/users/{username_or_id}) in Rdiffweb allows authenticated users to
  elevate their privileges to administrator by modifying the role parameter in a
  POST request.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-862
vendor: ikus-soft
product: rdiffweb
affected:
  - rdiffweb < 2.10.6
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T20:04:29.760'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109119'
references:
  - url: 'https://gitlab.com/ikus-soft/rdiffweb'
    label: cve@gitlab.com
  - url: >-
      https://gitlab.com/ikus-soft/rdiffweb/-/commit/4ce35fc2d23ac1cc789186f32bf76603b2eddeb3
    label: cve@gitlab.com
  - url: >-
      https://gitlab.com/ikus-soft/rdiffweb/-/commit/b529adf2c13a210d10aaf56325de4d3fb2428abe
    label: cve@gitlab.com
tags:
  - nvd
  - cve.org
epss: 0.0038
epssPercentile: 0.31788
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T13:31:02.410278Z'
ingestedAt: '2026-10-16T11:04:58.138Z'
---

## Overview

Improper Privilege Management in the user management API endpoint (/api/users/{username_or_id}) in Rdiffweb allows authenticated users to elevate their privileges to administrator by modifying the role parameter in a POST request.

## Remediation

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