---
id: CVE-2026-84204
title: >-
  GROWI contains an access control vulnerability in the GET
  /_api/v3/attachment/:id endpoint that fails to validate page access
  permissions
summary: >-
  GROWI contains an access control vulnerability in the GET
  /_api/v3/attachment/:id endpoint that fails to validate page access
  permissions. Authenticated attackers can retrieve attachment metadata from
  pages they cannot view by supplying …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-862
published: '2026-09-01'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:18:59.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84204'
references:
  - url: 'https://github.com/growilabs/growi'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/growilabs/growi/blob/v8.0.2/apps/app/src/server/routes/apiv3/attachment.js
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/growilabs/growi/commit/d298e0b1dbbf568c99db657fa0f7e90f72ddc59b
    label: disclosure@vulncheck.com
  - url: 'https://github.com/growilabs/growi/pull/11810'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/growi-through-8.0.2-missing-authorization-on-apiv3-attachment-retrieval
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00415
epssPercentile: 0.33036
ingestedAt: '2026-09-08T21:11:12.289Z'
---

## Overview

GROWI contains an access control vulnerability in the GET /_api/v3/attachment/:id endpoint that fails to validate page access permissions. Authenticated attackers can retrieve attachment metadata from pages they cannot view by supplying known attachment identifiers.

## Remediation

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