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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-v4w8-49pv-mf72 ChatterBot Vulnerable to Denial of Service via Database Connection Pool Exhaustion
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 21 Jan 2026 06:15:00 +0900

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 20 Jan 2026 17:45:00 +0900

Type Values Removed Values Added
First Time appeared Gunthercox
Gunthercox chatterbot
Vendors & Products Gunthercox
Gunthercox chatterbot

Tue, 20 Jan 2026 04:00:00 +0900

Type Values Removed Values Added
Description 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.
Title ChatterBot has Denial of Service via Database Connection Pool Exhaustion
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-20T20:05:48.462Z

Reserved: 2026-01-16T15:46:40.842Z

Link: CVE-2026-23842

cve-icon Vulnrichment

Updated: 2026-01-20T20:04:07.426Z

cve-icon NVD

Status : Received

Published: 2026-01-19T19:16:04.510

Modified: 2026-01-19T19:16:04.510

Link: CVE-2026-23842

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-20T17:40:28Z

Weaknesses