CWE-1427

Improper Neutralization of Input Used for LLM Prompting

1 CVEs Avg CVSS 8.7 MITRE
0
CRITICAL
1
HIGH
0
MEDIUM
0
LOW
0
POC
0
KEV

Monthly

CVE-2026-4399 HIGH This Week

Prompt injection in 1millionbot Millie chatbot allows remote attackers to bypass chat restrictions using Boolean logic techniques, enabling retrieval of prohibited information and execution of unintended tasks including potential abuse of OpenAI API keys. The vulnerability exploits insufficient input validation in the LLM's containment mechanisms, permitting attackers to reformulate queries in ways that trigger affirmative responses ('true') that then execute injected instructions outside the chatbot's intended scope.

Code Injection
NVD
CVSS 4.0
8.7
EPSS
0.2%
CVE-2026-4399
EPSS 0% CVSS 8.7
HIGH This Week

Prompt injection in 1millionbot Millie chatbot allows remote attackers to bypass chat restrictions using Boolean logic techniques, enabling retrieval of prohibited information and execution of unintended tasks including potential abuse of OpenAI API keys. The vulnerability exploits insufficient input validation in the LLM's containment mechanisms, permitting attackers to reformulate queries in ways that trigger affirmative responses ('true') that then execute injected instructions outside the chatbot's intended scope.

Code Injection
NVD

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