CVE-2026-23842
ChatterBot has Denial of Service via Database Connection Pool Exhaustion
- State
- Published
- Severity
- 7.5 High
- Published
- Jan 19, 2026
- Updated
- Jan 20, 2026
- Reserved
- Jan 16, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-400 Uncontrolled Resource Consumption
Affected Products
| Product | Versions |
|---|---|
ChatterBotgunthercox |
|
References
- https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72
- https://github.com/gunthercox/ChatterBot/pull/2432
- https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf
- https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11
- https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f
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