---
id: CVE-2026-110774
title: >-
  Blinko through 1.8.8 contains a broken access control vulnerability in the
  /api/file route that allows authenticated users to read other users' private
  attachments due to a flawed owner check
summary: >-
  Blinko through 1.8.8 contains a broken access control vulnerability in the
  /api/file route that allows authenticated users to read other users' private
  attachments due to a flawed owner check. Attackers can supply another user's
  stored f…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-639
vendor: blinkospace
product: blinko
affected:
  - blinko <= 1.8.8
published: '2026-10-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T15:17:28.940'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110774'
references:
  - url: 'https://github.com/blinkospace/blinko'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/blinkospace/blinko/blob/178e4b3538a21823a50ac2481e653d56cb1ffa86/server/routerExpress/file/file.ts#L148
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@hieuPenguinnn/blinko-attachment-accountid-idor'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/blinko-through-1.8.8-private-attachment-read-via-api-file-route
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T14:25:48.334970Z'
ingestedAt: '2026-10-14T19:49:57.613Z'
epss: 0.00237
epssPercentile: 0.14704
---

## Overview

Blinko through 1.8.8 contains a broken access control vulnerability in the /api/file route that allows authenticated users to read other users' private attachments due to a flawed owner check. Attackers can supply another user's stored filename, following a basename plus millisecond-timestamp pattern, to download private, non-shared attachments.

## Remediation

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