---
id: CVE-2026-77170
title: >-
  The Deck config API allows authenticated users to set board-scoped
  configuration keys for arbitrary board IDs without validating whether the user
  owns or has permission to manage the referenced board.
summary: >-
  The Deck config API allows authenticated users to set board-scoped
  configuration keys for arbitrary board IDs without validating whether the user
  owns or has permission to manage the referenced board.
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-284
vendor: Nextcloud
product: Deck
affected:
  - Deck >= 1.16.0 <= 1.18.0
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:17:22.493'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77170'
references:
  - url: 'https://hackerone.com/reports/3599383'
    label: support@hackerone.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T19:41:21.226672Z'
epss: 0.00161
epssPercentile: 0.05763
ingestedAt: '2026-09-18T01:33:24.270Z'
---

## Overview

The Deck config API allows authenticated users to set board-scoped configuration keys for arbitrary board IDs without validating whether the user owns or has permission to manage the referenced board.

## Remediation

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