{"cve":"CVE-2026-23842","nvd":{"published":"2026-01-19T19:16:04.510","modified":"2026-06-17T10:22:11.350","status":"Analyzed","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf","https://github.com/gunthercox/ChatterBot/pull/2432","https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11","https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72","https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f"],"products":["chatterbot:chatterbot"],"source":"nvd","synced_at":"2026-10-19T22:21:16.563232421+00:00"},"epss":{"cve":"CVE-2026-23842","score":0.00541,"percentile":0.45511,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v4w8-49pv-mf72","url":"https://osv.dev/vulnerability/GHSA-v4w8-49pv-mf72","summary":"ChatterBot Vulnerable to Denial of Service via Database Connection Pool Exhaustion","modified":"2026-07-07T17:56:29.902632670Z","packages":[{"ecosystem":"PyPI","name":"chatterbot","purl":"pkg:pypi/chatterbot","ranges":["<1.2.11"],"fixed":["1.2.11"]}]},{"id":"PYSEC-2026-1244","url":"https://osv.dev/vulnerability/PYSEC-2026-1244","summary":"ChatterBot Vulnerable to Denial of Service via Database Connection Pool Exhaustion","modified":"2026-07-07T17:47:27.106045442Z","packages":[{"ecosystem":"PyPI","name":"chatterbot","purl":"pkg:pypi/chatterbot","ranges":["<1.2.11"],"fixed":["1.2.11"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}