CVE-2026-85607
Medium
Elevated severity or exploit probability.
CVSS base
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.7%
50.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-639
Published 2026-09-04 · modified 2026-09-10
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.
References
- https://github.com/blinkospace/blinko
- https://github.com/blinkospace/blinko/blob/1.8.8/server/routerTrpc/conversation.ts
- https://github.com/blinkospace/blinko/blob/1.8.8/server/routerTrpc/message.ts
- https://github.com/blinkospace/blinko/issues/1218
- https://www.vulncheck.com/advisories/blinko-1.8.7-cross-user-ai-conversation-read-and-write-via-message-trpc-router
- https://github.com/blinkospace/blinko/issues/1218