{"api_version":"1","generated_at":"2026-07-24T18:47:24+00:00","cve":"CVE-2020-11995","urls":{"html":"https://cve.report/CVE-2020-11995","api":"https://cve.report/api/cve/CVE-2020-11995.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-11995","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-11995"},"summary":{"title":"CVE-2020-11995","description":"A deserialization vulnerability existed in dubbo 2.7.5 and its earlier versions, which could lead to malicious code execution. Most Dubbo users use Hessian2 as the default serialization/deserialization protool, during Hessian2 deserializing the HashMap object, some functions in the classes stored in HasMap will be executed after a series of program calls, however, those special functions may cause remote command execution. For example, the hashCode() function of the EqualsBean class in rome-1.7.0.jar will cause the remotely load malicious classes and execute malicious code by constructing a malicious request. This issue was fixed in Apache Dubbo 2.6.9 and 2.7.8.","state":"PUBLIC","assigner":"security@apache.org","published_at":"2021-01-11 10:15:00","updated_at":"2021-01-14 20:53:00"},"problem_types":["CWE-502"],"metrics":[],"references":[{"url":"https://lists.apache.org/thread.html/r5b2df4ef479209dc4ced457b3d58a887763b60b9354c3dc148b2eb5b%40%3Cdev.dubbo.apache.org%3E","name":"https://lists.apache.org/thread.html/r5b2df4ef479209dc4ced457b3d58a887763b60b9354c3dc148b2eb5b%40%3Cdev.dubbo.apache.org%3E","refsource":"MISC","tags":["Mailing List","Vendor Advisory"],"title":"Pony Mail!","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-11995","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-11995","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"11995","vulnerable":"1","versionEndIncluding":"2.5.10","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"apache","cpe5":"dubbo","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"11995","vulnerable":"1","versionEndIncluding":"2.6.8","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"apache","cpe5":"dubbo","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"11995","vulnerable":"1","versionEndIncluding":"2.7.7","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"apache","cpe5":"dubbo","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"security@apache.org","ID":"CVE-2020-11995","STATE":"PUBLIC","TITLE":"Apache Dubbo default deserialization protocol Hessian2 cause CRE"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Apache Dubbo","version":{"version_data":[{"version_affected":"<","version_name":"Apache Dubbo","version_value":"2.6.9"},{"version_affected":"<","version_name":"Apache Dubbo","version_value":"2.7.8"}]}}]},"vendor_name":"Apache Software Foundation"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"A deserialization vulnerability existed in dubbo 2.7.5 and its earlier versions, which could lead to malicious code execution. Most Dubbo users use Hessian2 as the default serialization/deserialization protool, during Hessian2 deserializing the HashMap object, some functions in the classes stored in HasMap will be executed after a series of program calls, however, those special functions may cause remote command execution. For example, the hashCode() function of the EqualsBean class in rome-1.7.0.jar will cause the remotely load malicious classes and execute malicious code by constructing a malicious request. This issue was fixed in Apache Dubbo 2.6.9 and 2.7.8."}]},"generator":{"engine":"Vulnogram 0.0.9"},"impact":[],"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-502 Deserialization of Untrusted Data"}]}]},"references":{"reference_data":[{"refsource":"MISC","url":"https://lists.apache.org/thread.html/r5b2df4ef479209dc4ced457b3d58a887763b60b9354c3dc148b2eb5b%40%3Cdev.dubbo.apache.org%3E","name":"https://lists.apache.org/thread.html/r5b2df4ef479209dc4ced457b3d58a887763b60b9354c3dc148b2eb5b%40%3Cdev.dubbo.apache.org%3E"}]},"source":{"discovery":"UNKNOWN"}},"nvd":{"publishedDate":"2021-01-11 10:15:00","lastModifiedDate":"2021-01-14 20:53:00","problem_types":["CWE-502"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"},"exploitabilityScore":3.9,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":7.5},"severity":"HIGH","exploitabilityScore":10,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:apache:dubbo:*:*:*:*:*:*:*:*","versionStartIncluding":"2.5.0","versionEndIncluding":"2.5.10","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:apache:dubbo:*:*:*:*:*:*:*:*","versionStartIncluding":"2.7.0","versionEndIncluding":"2.7.7","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:apache:dubbo:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.0","versionEndIncluding":"2.6.8","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"11995","Ordinal":"173133","Title":"CVE-2020-11995","CVE":"CVE-2020-11995","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"11995","Ordinal":"1","NoteData":"A deserialization vulnerability existed in dubbo 2.7.5 and its earlier versions, which could lead to malicious code execution. Most Dubbo users use Hessian2 as the default serialization/deserialization protool, during Hessian2 deserializing the HashMap object, some functions in the classes stored in HasMap will be executed after a series of program calls, however, those special functions may cause remote command execution. For example, the hashCode() function of the EqualsBean class in rome-1.7.0.jar will cause the remotely load malicious classes and execute malicious code by constructing a malicious request. This issue was fixed in Apache Dubbo 2.6.9 and 2.7.8.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"11995","Ordinal":"2","NoteData":"2021-01-11","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"11995","Ordinal":"3","NoteData":"2021-01-11","Type":"Other","Title":"Modified"}]}}}