CVE-2026-23842

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{"affected": [{"affectedData": [{"product": "ChatterBot", "vendor": "gunthercox", "versions": [{"status": "affected", "version": "< 1.2.11"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:chatterbot:chatterbot:*:*:*:*:*:*:*:*", "matchCriteriaId": "4D8B9379-D459-4198-B388-2BCC2378AB98", "versionEndExcluding": "1.2.11", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "ChatterBot es un motor de di\u00e1logo conversacional de aprendizaje autom\u00e1tico para crear chatbots. Las versiones de ChatterBot hasta la 1.2.10 son vulnerables a una condici\u00f3n de denegaci\u00f3n de servicio causada por una gesti\u00f3n inadecuada de la sesi\u00f3n de base de datos y del pool de conexiones. Las invocaciones concurrentes del m\u00e9todo get_response() pueden agotar el pool de conexiones subyacente de SQLAlchemy, lo que resulta en una indisponibilidad persistente del servicio y requiere un reinicio manual para recuperarse. La versi\u00f3n 1.2.11 soluciona el problema."}], "id": "CVE-2026-23842", "lastModified": "2026-06-17T10:22:11.350", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23842", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-20T20:04:06.342314Z", "version": "2.0.3"}}]}, "published": "2026-01-19T19:16:04.510", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/gunthercox/ChatterBot/commit/de89fe648139f8eeacc998ad4524fab291a378cf"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/gunthercox/ChatterBot/pull/2432"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/gunthercox/ChatterBot/releases/tag/1.2.11"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/gunthercox/ChatterBot/security/advisories/GHSA-v4w8-49pv-mf72"}, {"source": "security-advisories@github.com", "tags": ["Exploit"], "url": "https://github.com/user-attachments/assets/4ee845c4-b847-4854-84ec-4b2fb2f7090f"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T05:03:39.104581+00:00", "value": {"mitigation_remediation": ["Upgrade to ChatterBot version 1.2.11 or later, which includes the connection pool fix.", "If an upgrade is not immediately possible, implement request throttling or concurrency limits on the get_response() method to prevent exhausting the database pool.", "Continuously monitor the database connection pool usage and perform a graceful restart of the service if the pool becomes saturated."], "summary": {"action": "Patch Immediately", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The affected product is ChatterBot, a conversation engine developed by gunthercox. Versions up to 1.2.10 are vulnerable; the issue was fixed in version 1.2.11. No other dependent libraries or platforms are specifically mentioned.", "description_and_impact": "The vulnerability in ChatterBot versions up to 1.2.10 arises from improper handling of SQLAlchemy database sessions and the underlying connection pool. Concurrent calls to the get_response() method can exhaust the pool, causing the bot to become unavailable until a manual restart is performed. This is a resource exhaustion flaw (CWE-400) that results in denial of service, disrupting availability for legitimate users.", "risk_and_exploitability": "The CVSS score of 7.5 indicates a medium\u2011high severity level, though the EPSS score of less than 1% suggests a low likelihood of exploitation. The vulnerability is not listed in the CISA KEV catalog. Attackers can trigger the denial of service by sending a high volume of requests to the bot\u2019s get_response() endpoint, typically over a network interface that exposes the bot. In practice, the attack vector would be remote, leveraging the bot\u2019s public API or webhooks, assuming the bot is accessible over the internet. Without a publicly documented exploit, a successful attack would require an active user session or the ability to invoke the get_response() method repeatedly."}}}}, "created": "2026-01-20T08:40:28.581677+00:00", "updated": "2026-04-18T05:15:15.972581+00:00", "vendors": ["gunthercox", "gunthercox$PRODUCT$chatterbot"]}