High 7.5Published Jan 19, 2026

CVE-2026-23842ChatterBot has Denial of Service via Database Connection Pool Exhaustion

Updated under an hour ago (Oct 27, 2026, 11:10 PM ET)

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It affects gunthercox ChatterBot and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for gunthercox ChatterBot

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jan 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

gunthercox ChatterBot gunthercox:chatterbot (from the name)	before 1.2.11	CNA record
chatterbot chatterbot chatterbot:chatterbot	before 1.2.11	NVD

References

References

https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72	x-refsource-confirm, exploit, vendor-advisory
https://github.com/gunthercox/ChatterBot/pull/2432	x-refsource-misc, issue-tracking
https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf	x-refsource-misc, patch
https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11	x-refsource-misc, product, release-notes
https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f	x-refsource-misc, exploit

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.