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Vulnerability record · CVE-2026-85607 · published 4 September 2026

CVE-2026-85607: Insecure direct object reference vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.69% · top 49.1% CWE-639 · Insecure direct object reference Deferred
8.7CVSS 4.0 base score
0.69%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
10 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.4CVE-2026-55255Langflow IDOR in responses endpoint allows cross-user flow executionLangflow before 1.9.1 has an insecure direct object reference in the /api/v1/responses endpoint. An authenticated attacker can supply another user's …KEVEPSS 0.89%analysed

Source: NIST National Vulnerability Database (record CVE-2026-85607), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.