What’s Vulnerable › Vulnerabilities
CVE-2026-4400: Multiple vulnerabilities in 1millionbot Millie chatbot
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-31 · updated 2026-06-17
- Weakness: CWE-639
Description
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.
Affected products
- 1millionbot Millie chat: before 3.6.0 — fixed in 3.6.0
How to fix
Upgrade to a fixed version: 1millionbot Millie chat 3.6.0. Check the vendor advisory for mitigations.
References
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