{"api_version":"1","generated_at":"2026-04-09T23:56:48+00:00","cve":"CVE-2020-26800","urls":{"html":"https://cve.report/CVE-2020-26800","api":"https://cve.report/api/cve/CVE-2020-26800.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-26800","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-26800"},"summary":{"title":"CVE-2020-26800","description":"A stack overflow vulnerability in Aleth Ethereum C++ client version <= 1.8.0 using a specially crafted a config.json file may result in a denial of service.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2021-01-11 13:15:00","updated_at":"2021-01-13 19:57:00"},"problem_types":["CWE-787"],"metrics":[],"references":[{"url":"https://github.com/ethereum/aleth","name":"https://github.com/ethereum/aleth","refsource":"MISC","tags":["Third Party Advisory"],"title":"GitHub - ethereum/aleth: Aleth – Ethereum C++ client, tools and libraries","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/ethereum/aleth/issues/5917","name":"https://github.com/ethereum/aleth/issues/5917","refsource":"MISC","tags":["Exploit","Third Party Advisory"],"title":"[CVE-2020-26800] Stack based buffer overflow while parsing JSON file · Issue #5917 · ethereum/aleth · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://ethereum.org/en/about/","name":"https://ethereum.org/en/about/","refsource":"MISC","tags":["Vendor Advisory"],"title":"About Us | ethereum.org","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-26800","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26800","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"26800","vulnerable":"1","versionEndIncluding":"1.8.0","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ethereum","cpe5":"aleth","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":"cve@mitre.org","ID":"CVE-2020-26800","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"A stack overflow vulnerability in Aleth Ethereum C++ client version <= 1.8.0 using a specially crafted a config.json file may result in a denial of service."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://github.com/ethereum/aleth","refsource":"MISC","name":"https://github.com/ethereum/aleth"},{"url":"https://ethereum.org/en/about/","refsource":"MISC","name":"https://ethereum.org/en/about/"},{"refsource":"MISC","name":"https://github.com/ethereum/aleth/issues/5917","url":"https://github.com/ethereum/aleth/issues/5917"}]}},"nvd":{"publishedDate":"2021-01-11 13:15:00","lastModifiedDate":"2021-01-13 19:57:00","problem_types":["CWE-787"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM"},"exploitabilityScore":1.8,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:N/A:P","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:ethereum:aleth:*:*:*:*:*:*:*:*","versionEndIncluding":"1.8.0","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"26800","Ordinal":"188234","Title":"CVE-2020-26800","CVE":"CVE-2020-26800","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"26800","Ordinal":"1","NoteData":"A stack overflow vulnerability in Aleth Ethereum C++ client version <= 1.8.0 using a specially crafted a config.json file may result in a denial of service.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"26800","Ordinal":"2","NoteData":"2021-01-11","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"26800","Ordinal":"3","NoteData":"2021-01-11","Type":"Other","Title":"Modified"}]}}}