CVE-2026-85607

HIGH 8.8

Blinko 1.8.7 Cross-User AI Conversation Read and Write via message tRPC Router

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-639
Vendor	blinkospace
Product	blinko
Published	Sep 4, 2026
Last Updated	Sep 8, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

blinkospace / blinko

0 ≤ 1.8.8

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/blinkospace/blinko/issues/1218 github.com: https://github.com/blinkospace/blinko github.com: https://github.com/blinkospace/blinko/blob/1.8.8/server/routerTrpc/message.ts github.com: https://github.com/blinkospace/blinko/blob/1.8.8/server/routerTrpc/conversation.ts vulncheck.com: https://www.vulncheck.com/advisories/blinko-1.8.7-cross-user-ai-conversation-read-and-write-via-message-trpc-router

Credits

George Chen