---
id: CVE-2026-53527
title: LeafWiki is a self-hosted wiki
summary: >-
  LeafWiki is a self-hosted wiki. Versions 0.1.0 through 0.10.0 have a privilege
  escalation vulnerability in the user update API. An authenticated user could
  update their own account role and escalate privileges from a regular user,
  such a…
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-269
published: '2026-08-21'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:06:39.057'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53527'
references:
  - url: 'https://github.com/perber/leafwiki/security/advisories/GHSA-jj4r-587p-r5h5'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00245
epssPercentile: 0.16046
ingestedAt: '2026-09-09T21:22:45.548Z'
---

## Overview

LeafWiki is a self-hosted wiki. Versions 0.1.0 through 0.10.0 have a privilege escalation vulnerability in the user update API. An authenticated user could update their own account role and escalate privileges from a regular user, such as `viewer`, to `admin`. Exploitation requires a valid authenticated LeafWiki user account. Instances without public registration and with only trusted users are at lower practical risk. Users should update to version 0.10.1 or greater. Until a patch is available, operators should restrict account creation and ensure that only trusted users have accounts on affected LeafWiki instances. If possible, access to the user update API should be restricted to trusted users or administrators only.

## Remediation

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