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Vulnerability details: VCID-stzz-prj7-wyer
Vulnerability ID VCID-stzz-prj7-wyer
Aliases CVE-2026-23842
GHSA-v4w8-49pv-mf72
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-400 Uncontrolled Resource Consumption
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00039 https://api.first.org/data/v1/epss?cve=CVE-2026-23842
epss 0.00039 https://api.first.org/data/v1/epss?cve=CVE-2026-23842
epss 0.00039 https://api.first.org/data/v1/epss?cve=CVE-2026-23842
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-v4w8-49pv-mf72
cvssv3.1 7.5 https://github.com/gunthercox/ChatterBot
generic_textual HIGH https://github.com/gunthercox/ChatterBot
cvssv3.1 7.5 https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf
generic_textual HIGH https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf
ssvc Track https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf
cvssv3.1 7.5 https://github.com/gunthercox/ChatterBot/pull/2432
generic_textual HIGH https://github.com/gunthercox/ChatterBot/pull/2432
ssvc Track https://github.com/gunthercox/ChatterBot/pull/2432
cvssv3.1 7.5 https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11
generic_textual HIGH https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11
ssvc Track https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11
cvssv3.1 7.5 https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72
cvssv3.1_qr HIGH https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72
generic_textual HIGH https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72
ssvc Track https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72
cvssv3.1 7.5 https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f
generic_textual HIGH https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f
ssvc Track https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2026-23842
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-23842
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-23842
https://github.com/gunthercox/ChatterBot
1.2.11 https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11
2432 https://github.com/gunthercox/ChatterBot/pull/2432
4ee845c4-b847-4854-84ec-4b2fb2f7090f https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f
CVE-2026-23842 https://nvd.nist.gov/vuln/detail/CVE-2026-23842
de89fe648139f8eeacc998ad4524fab291a378cf https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf
GHSA-v4w8-49pv-mf72 https://github.com/advisories/GHSA-v4w8-49pv-mf72
GHSA-v4w8-49pv-mf72 https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/gunthercox/ChatterBot
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-01-20T20:04:06Z/ Found at https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/gunthercox/ChatterBot/pull/2432
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-01-20T20:04:06Z/ Found at https://github.com/gunthercox/ChatterBot/pull/2432
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-01-20T20:04:06Z/ Found at https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-01-20T20:04:06Z/ Found at https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-01-20T20:04:06Z/ Found at https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2026-23842
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.12203
EPSS Score 0.00039
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:41:58.688046+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/23xxx/CVE-2026-23842.json 38.6.0