ChatterBot — Dos (CVE-2026-23842)
Date: 2026-01
Affected: chatterbot/chatterbot
Attack vector: dos
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2026-23842
CWE: CWE-400
CVSS: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

ChatterBot is a machine learning, conversational dialog engine for creating chat bots. ChatterBot versions up to 1.2.10 are vulnerable to a denial-of-service condition caused by improper database session and connection pool management. Concurrent invocations of the get_response() method can exhaust the underlying SQLAlchemy connection pool, resulting in persistent service unavailability and requiring a manual restart to recover. Version 1.2.11 fixes the issue.


Mitigations:

Architectural layers (MAESTRO):