CVE-2026-4400 in 1millionbot Millie Chatbotinfo

Summary

Insecure Direct Object Reference (IDOR) vulnerability in 1millionbot Millie chat that allows private conversations of other users being viewed by simply changing the conversation ID. The vulnerability is present in the endpoint 'api.1millionbot.com/api/public/conversations/' and, if exploited, could allow a remote attacker to access other users private chatbot conversations, revealing sensitive or confidential data without requiring credentials or impersonating users. In order for the vulnerability to be exploited, the attacker must have the user's conversation ID.

Responsible

INCIBE

Reservation

03/18/2026

Disclosure

03/31/2026

Entries

VulDB provides additional information and datapoints for this CVE:

IDVulnerabilityCWEExpCouCVE
3543591millionbot Millie Chatbot conversations authorization639Not definedNot definedCVE-2026-4400

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