---
id: CVE-2026-82982
title: >-
  The Approval app's approve/reject endpoint is meant to require the file's
  current etag as a freshness check, preventing an approver from approving or
  rejecting a file whose contents changed after they reviewed it
summary: >-
  The Approval app's approve/reject endpoint is meant to require the file's
  current etag as a freshness check, preventing an approver from approving or
  rejecting a file whose contents changed after they reviewed it. The backend
  only enforc…
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-840
vendor: Nextcloud
product: Approval
affected:
  - Approval >= 1.0.0 <= 3.0.0
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:17:25.790'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82982'
references:
  - url: 'https://hackerone.com/reports/3610332'
    label: support@hackerone.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T19:41:50.479115Z'
epss: 0.00329
epssPercentile: 0.23436
ingestedAt: '2026-09-18T01:33:24.271Z'
---

## Overview

The Approval app's approve/reject endpoint is meant to require the file's current etag as a freshness check, preventing an approver from approving or rejecting a file whose contents changed after they reviewed it. The backend only enforced this check when the etag parameter was present and non-empty in the request. An attacker able to intercept and modify the approval request could omit the etag field entirely, bypassing the freshness check and approving or rejecting a file version they never reviewed.

## Remediation

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