CVE-2026-40682

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The public <code>Dictionary(InputStream)</code> constructor delegates directly to this method and is the documented API for loading user-supplied dictionaries, making untrusted input a realistic scenario.</p>\n<p><strong>Mitigation:</strong> 2.x users should upgrade to 2.5.9. 3.x users should upgrade to 3.0.0-M3. Users who cannot upgrade immediately should ensure that all dictionary files are sourced from trusted origins and should consider wrapping the <code>Dictionary(InputStream)</code> constructor with input validation that rejects any XML containing a DOCTYPE declaration before it reaches the parser.<br></p>"}], "value": "XML External Entity (XXE) via Unsanitized Dictionary Parsing in Apache OpenNLP DictionaryEntryPersistor\n\n\nVersions Affected: before 2.5.9, before 3.0.0-M3\n\n\nDescription: The DictionaryEntryPersistor class initializes a static SAXParserFactory at class-load time without enabling FEATURE_SECURE_PROCESSING or disabling DTD processing. 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Users who cannot upgrade immediately should ensure that all dictionary files are sourced from trusted origins and should consider wrapping the Dictionary(InputStream) constructor with input validation that rejects any XML containing a DOCTYPE declaration before it reaches the parser."}], "metrics": [{"other": {"content": {"text": "moderate"}, "type": "Textual description of severity"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-611", "description": "CWE-611 Improper Restriction of XML External Entity Reference", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-06-30T07:16:49.842Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://lists.apache.org/thread/r6jpt0qr9nj67gqhppqg7jxf8vsbo0w6"}], "source": {"discovery": "EXTERNAL"}, "title": "Apache OpenNLP: XXE via Dictionary Parsing in DictionaryEntryPersistor", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/01/19"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-05-04T17:36:52.681Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-05-05T15:01:49.614474Z", "id": "CVE-2026-40682", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-05T15:02:14.483Z"}}, {"affected": [{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:camel_spring_boot:4"], "defaultStatus": "unaffected", "packageName": "opennlp-tools", "product": "Red Hat build of Apache Camel for Spring Boot 4", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:jboss_data_grid:8"], "defaultStatus": "unaffected", "packageName": "opennlp-tools", "product": "Red Hat Data Grid 8", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:jboss_fuse:7"], "defaultStatus": "unaffected", "packageName": "opennlp-maxent", "product": "Red Hat Fuse 7", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:jboss_fuse:7"], "defaultStatus": "unaffected", "packageName": "opennlp-tools", "product": "Red Hat Fuse 7", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:jboss_enterprise_application_platform:8"], "defaultStatus": "unaffected", "packageName": "opennlp-tools", "product": "Red Hat JBoss Enterprise Application Platform 8", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:jbosseapxp"], "defaultStatus": "unaffected", "packageName": "opennlp-tools", "product": "Red Hat JBoss Enterprise Application Platform Expansion Pack", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:openshift_ai"], "defaultStatus": "affected", "packageName": "rhoai/odh-trustyai-service-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:openshift_ai"], "defaultStatus": "affected", "packageName": "rhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat"}], "datePublic": "2026-05-04T16:55:55.834Z", "descriptions": [{"lang": "en", "value": "A flaw was found in Apache OpenNLP. 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Users who cannot upgrade immediately should ensure that all dictionary files are sourced from trusted origins and should consider wrapping the <code>Dictionary(InputStream)</code> constructor with input validation that rejects any XML containing a DOCTYPE declaration before it reaches the parser.<br></p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-611", "description": "CWE-611 Improper Restriction of XML External Entity Reference"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-06-30T07:16:49.842Z"}}}, "cveMetadata": {"cveId": "CVE-2026-40682", "state": "PUBLISHED", "dateUpdated": "2026-09-01T12:04:55.794Z", "dateReserved": "2026-04-14T17:21:09.189Z", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "datePublished": "2026-05-04T16:55:55.834Z", "assignerShortName": "apache"}, "dataVersion": "5.2"}

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When create(InputStream, EntryInserter) is invoked, the only feature set on the XMLReader is namespace support \u2014 external entity resolution and DOCTYPE declarations remain fully enabled. An attacker who can supply a crafted dictionary file (e.g., a stop-word list or domain dictionary) containing a malicious DOCTYPE declaration can trigger local file disclosure via file:// entity references or server-side request forgery via http:// entity references during SAX parsing, before the application processes a single dictionary entry. This is inconsistent with the project's own XmlUtil.createSaxParser() helper, which correctly sets FEATURE_SECURE_PROCESSING and disallow-doctype-decl and is used by all other XML parsing paths in the codebase. The public Dictionary(InputStream) constructor delegates directly to this method and is the documented API for loading user-supplied dictionaries, making untrusted input a realistic scenario.\n\n\nMitigation: 2.x users should upgrade to 2.5.9. 3.x users should upgrade to 3.0.0-M3. Users who cannot upgrade immediately should ensure that all dictionary files are sourced from trusted origins and should consider wrapping the Dictionary(InputStream) constructor with input validation that rejects any XML containing a DOCTYPE declaration before it reaches the parser."}, {"lang": "es", "value": "Entidad Externa XML (XXE) a trav\u00e9s de An\u00e1lisis de Diccionario no Saneado en Apache OpenNLP DictionaryEntryPersistor\n\nVersiones Afectadas: anteriores a 2.5.9, anteriores a 3.0.0-M3\n\nDescripci\u00f3n: La clase DictionaryEntryPersistor inicializa una SAXParserFactory est\u00e1tica en el momento de la carga de la clase sin habilitar FEATURE_SECURE_PROCESSING o deshabilitar el procesamiento de DTD. Cuando se invoca create(InputStream, EntryInserter), la \u00fanica caracter\u00edstica configurada en el XMLReader es el soporte de espacios de nombres - la resoluci\u00f3n de entidades externas y las declaraciones DOCTYPE permanecen completamente habilitadas. Un atacante que puede proporcionar un archivo de diccionario manipulado (por ejemplo, una lista de palabras vac\u00edas o un diccionario de dominio) que contiene una declaraci\u00f3n DOCTYPE maliciosa puede desencadenar la divulgaci\u00f3n de archivos locales a trav\u00e9s de referencias de entidad file: // o falsificaci\u00f3n de petici\u00f3n del lado del servidor a trav\u00e9s de referencias de entidad http:// durante el an\u00e1lisis SAX, antes de que la aplicaci\u00f3n procese una sola entrada de diccionario. Esto es inconsistente con el ayudante XmlUtil.createSaxParser() propio del proyecto, que configura correctamente FEATURE_SECURE_PROCESSING y disallow-doctype-decl y es utilizado por todas las dem\u00e1s rutas de an\u00e1lisis XML en la base de c\u00f3digo. El constructor p\u00fablico Dictionary(InputStream) delega directamente en este m\u00e9todo y es la API documentada para cargar diccionarios proporcionados por el usuario, lo que convierte la entrada no confiable en un escenario realista.\n\nMitigaci\u00f3n: Los usuarios de 2.x deber\u00edan actualizar a 2.5.9. Los usuarios de 3.x deber\u00edan actualizar a 3.0.0-M3. Los usuarios que no puedan actualizar inmediatamente deber\u00edan asegurarse de que todos los archivos de diccionario provengan de or\u00edgenes confiables y deber\u00edan considerar envolver el constructor Dictionary(InputStream) con validaci\u00f3n de entrada que rechace cualquier XML que contenga una declaraci\u00f3n DOCTYPE antes de que llegue al analizador."}], "id": "CVE-2026-40682", "lastModified": "2026-10-26T19:10:00.163", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40682", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-05T15:01:49.614474Z", "version": "2.0.3"}}]}, "published": "2026-05-04T17:16:23.657", "references": [{"source": "security@apache.org", "tags": ["Mailing List", "Vendor Advisory"], "url": "https://lists.apache.org/thread/r6jpt0qr9nj67gqhppqg7jxf8vsbo0w6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/05/01/19"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-40682"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2466484"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40682.json"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-611"}], "source": "security@apache.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-611"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "org.apache.opennlp/opennlp-tools: Apache OpenNLP: XML External Entity (XXE) vulnerability via crafted dictionary parsing", "id": "2466484", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2466484"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-611", "details": ["A flaw was found in Apache OpenNLP. A remote attacker can exploit this vulnerability by providing a specially crafted dictionary file. This can lead to an XML External Entity (XXE) injection, which allows for the disclosure of local files or enables server-side request forgery (SSRF), where the server makes unauthorized requests to other systems."], "name": "CVE-2026-40682", "package_state": [{"cpe": "cpe:/a:redhat:jboss_data_grid:8", "fix_state": "Under investigation", "package_name": "opennlp-tools", "product_name": "Red Hat Data Grid 8"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Under investigation", "package_name": "opennlp-maxent", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Under investigation", "package_name": "opennlp-tools", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jbosseapxp", "fix_state": "Under investigation", "package_name": "opennlp-tools", "product_name": "Red Hat JBoss Enterprise Application Platform Expansion Pack"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Under investigation", "package_name": "rhoai/odh-trustyai-service-rhel8", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Under investigation", "package_name": "rhoai/odh-trustyai-service-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Under investigation", "package_name": "rhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-05-04T16:55:55Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-40682\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-40682\nhttp://www.openwall.com/lists/oss-security/2026/05/01/19\nhttps://lists.apache.org/thread/r6jpt0qr9nj67gqhppqg7jxf8vsbo0w6"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.5.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0,3.0.0-M3)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Apache OpenNLP", "source": "cna", "vendor": "Apache Software Foundation"}, "product": "opennlp", "vendor": "apache"}], "created": "2026-05-04T19:00:06.928794+00:00", "updated": "2026-05-05T18:00:13.742205+00:00", "vendors": ["apache", "apache$PRODUCT$opennlp"]}