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.
Metrics
CVSS 3.1 5.3/10
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| blinkospace | blinko | <= 1.8.8 |
References
- https://github.com/blinkospace/blinko
- https://github.com/blinkospace/blinko/blob/178e4b3538a21823a50ac2481e653d56cb1ffa86/server/routerExpress/file/file.ts#L148
- https://hackmd.io/@hieuPenguinnn/blinko-attachment-accountid-idor
- https://www.vulncheck.com/advisories/blinko-through-1.8.8-private-attachment-read-via-api-file-route
Timeline
- Published
- Oct 14, 2026
- Last modified
- Oct 15, 2026
- NVD status
- Deferred