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CVE-2026-23842

Chatterbot denial of service

7.5 HIGHPublic exploitEPSS 0.55%
  1. Published19 Jan 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Chatterbot< 1.2.11

Remediation

Fixed in
Chatterbot≥ 1.2.11

References

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Frequently asked

Is CVE-2026-23842 being actively exploited?

CVE-2026-23842 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.55%.

How severe is CVE-2026-23842?

CVE-2026-23842 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.55% probability of exploitation.

Which products are affected by CVE-2026-23842?

Affected products include Chatterbot.

How do I fix CVE-2026-23842?

Upgrade affected software to a fixed version, for example Chatterbot 1.2.11 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-23842 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.