CVE-2026-110774 Blinko through 1.8.8 Private Attachment Read via /api/file Route
Authenticated users can read other users' private attachments by exploiting a flawed owner check in the file API route.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-110774?
CVE-2026-110774 is a medium-severity missing authorization vulnerability in blinkospace blinko, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-110774?
How do I fix CVE-2026-110774?
No fix has been published for CVE-2026-110774 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-110774 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-110774 exists.
Sources
Also known as GHSA-62f6-6f4g-pr5m.