CVE-2026-85607 Blinko 1.8.7 Cross-User AI Conversation Read and Write via message tRPC Router
Authenticated users can read, modify, or delete other users' AI chat conversations due to missing ownership checks in tRPC procedures.
- 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-2026-85607?
CVE-2026-85607 is a high-severity missing authorization vulnerability in blinkospace blinko, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Blinko 1.8.7 contains an authorization bypass (IDOR) vulnerability in multiple tRPC procedures (message.list, message.update, message.delete, message.clearAfter in server/routerTrpc/message.ts and conversation.clearMessages in server/routerTrpc/conversation.ts). Although these procedures require authentication, they query the database by caller-supplied conversation or message ID without verifying that the resource belongs to the requesting account. Any authenticated user can therefore read another user's full AI chat history, modify individual message content, and delete or wipe entire conversations by enumerating sequential integer IDs.
Weakness: CWE-639
Which versions are affected by CVE-2026-85607?
How do I fix CVE-2026-85607?
No fix has been published for CVE-2026-85607 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-2026-85607 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85607 exists.
Sources
Also known as GHSA-2rx6-45h4-gf4q.