CVE-2026-110774
Blinko through 1.8.8 Private Attachment Read via /api/file Route
- State
- Published
- Severity
- 6.0 Medium
- Published
- Oct 14, 2026
- Updated
- Oct 15, 2026
- Reserved
- Oct 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.0 Medium | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
blinkoblinkospace |
|
References
- https://hackmd.io/@hieuPenguinnn/blinko-attachment-accountid-idortechnical-descriptionexploit
- https://github.com/blinkospace/blinko/blob/178e4b3538a21823a50ac2481e653d56cb1ffa86/server/routerExpress/file/file.ts#L148technical-description
- https://github.com/blinkospace/blinkoproduct
- VulnCheck Advisory: Blinko through 1.8.8 Private Attachment Read via /api/file Routethird-party-advisory
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