Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck
CVE-2026-110774Blinko through 1.8.8 Private Attachment Read via /api/file Route
Medium 5.3
In plain English
A medium-severity authorization bypass via user-controlled key in blinko from blinkospace. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 85.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| blinkospace | blinko | 0 – through 1.8.8 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- https://hackmd.io/@hieuPenguinnn/blinko-attachment-accountid-idor technical-description, exploit
- https://github.com/blinkospace/blinko/blob/178e4b3538a21823a50ac2481e653d56cb1ffa86/server/routerExpress/file/file.ts#L148 technical-description
- https://github.com/blinkospace/blinko product
- VulnCheck Advisory: Blinko through 1.8.8 Private Attachment Read via /api/file Route third-party-advisory