CVE-2026-23842

HIGH

ChatterBot <1.2.10 - DoS

Title source: llm

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.

Exploits (2)

github WORKING POC 10 stars

by XiaomingX · pythonpoc

https://github.com/XiaomingX/data-cve-poc-py-v1/tree/main/2026/CVE-2026-23842

View Code ZIP pw:eip

nomisec WORKING POC 1 stars

by AdityaBhatt3010 · poc

https://github.com/AdityaBhatt3010/CVE-2026-23842-Denial-of-Service-via-Database-Connection-Pool-Exhaustion-version-1.2.10

View Code ZIP pw:eip

References (5)

[Patch] https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf

[Issue Tracking] https://github.com/gunthercox/ChatterBot/pull/2432

[Product, Release Notes] https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11

[Exploit, Vendor Advisory] https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72

[Exploit] https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f

Scores

CVSS v3 7.5

EPSS 0.0003

EPSS Percentile 9.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-400

Status published

Products (2)

chatterbot/chatterbot < 1.2.11

pypi/chatterbot 0 - 1.2.11PyPI

Published Jan 19, 2026

Tracked Since Feb 18, 2026