Authorization Bypass Vulnerability in Blinko 1.8.7 by Blinko Space
CVE-2026-85607

8.7HIGH

Key Information:

Vendor

Blinkospace

Status
Blinko
Vendor
CVE Published:
4 September 2026

What is CVE-2026-85607?

Blinko version 1.8.7 contains a significant vulnerability that allows authenticated users to bypass authorization checks. This flaw resides within multiple tRPC procedures, specifically within the message and conversation routing functions. Despite enforcing authentication, the application fails to validate the ownership of the message or conversation IDs submitted by a user. Consequently, any authenticated user can exploit this weakness to access another user's entire AI chat history, alter individual messages, and delete or wipe complete conversations by exploiting sequential integer IDs.

Affected Version(s)

blinko 0 <= 1.8.8

References

https://github.com/blinkospace/blinko/issues/1218
issue-tracking
https://github.com/blinkospace/blinko
product
https://github.com/blinkospace/blinko/blob/1.8.8/server/r...
technical-description

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.