{"api_version":"1","generated_at":"2026-04-26T15:31:05+00:00","cve":"CVE-2023-34188","urls":{"html":"https://cve.report/CVE-2023-34188","api":"https://cve.report/api/cve/CVE-2023-34188.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-34188","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-34188"},"summary":{"title":"CVE-2023-34188","description":"The HTTP server in Mongoose before 7.10 accepts requests containing negative Content-Length headers. By sending a single attack payload over TCP, an attacker can cause an infinite loop in which the server continuously reparses that payload, and does not respond to any other requests.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2023-06-23 20:15:00","updated_at":"2023-09-06 17:15:00"},"problem_types":["NVD-CWE-Other"],"metrics":[],"references":[{"url":"https://github.com/cesanta/mongoose/commit/4663090a8fb036146dfe77718cff612b0101cb0f","name":"https://github.com/cesanta/mongoose/commit/4663090a8fb036146dfe77718cff612b0101cb0f","refsource":"MISC","tags":[],"title":"Added check for negative value for HTTP Content-Length header · cesanta/mongoose@4663090 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/cesanta/mongoose/compare/7.9...7.10","name":"https://github.com/cesanta/mongoose/compare/7.9...7.10","refsource":"MISC","tags":[],"title":"Comparing 7.9...7.10 · cesanta/mongoose · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/cesanta/mongoose/pull/2197","name":"https://github.com/cesanta/mongoose/pull/2197","refsource":"MISC","tags":[],"title":"Added check for negative value for HTTP Content-Length header by allanpark · Pull Request #2197 · cesanta/mongoose · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://blog.narfindustries.com/blog/narf-discovers-critical-vulnerabilities-in-cesanta-mongoose-http-server","name":"https://blog.narfindustries.com/blog/narf-discovers-critical-vulnerabilities-in-cesanta-mongoose-http-server","refsource":"MISC","tags":[],"title":"Narf Discovers Critical Vulnerabilities in Cesanta Mongoose HTTP Server","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-34188","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-34188","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"34188","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"cesanta","cpe5":"mongoose","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-2023-34188","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":"The HTTP server in Mongoose before 7.10 accepts requests containing negative Content-Length headers. By sending a single attack payload over TCP, an attacker can cause an infinite loop in which the server continuously reparses that payload, and does not respond to any other requests."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://github.com/cesanta/mongoose/commit/4663090a8fb036146dfe77718cff612b0101cb0f","refsource":"MISC","name":"https://github.com/cesanta/mongoose/commit/4663090a8fb036146dfe77718cff612b0101cb0f"},{"url":"https://github.com/cesanta/mongoose/pull/2197","refsource":"MISC","name":"https://github.com/cesanta/mongoose/pull/2197"},{"refsource":"MISC","name":"https://github.com/cesanta/mongoose/compare/7.9...7.10","url":"https://github.com/cesanta/mongoose/compare/7.9...7.10"},{"refsource":"MISC","name":"https://blog.narfindustries.com/blog/narf-discovers-critical-vulnerabilities-in-cesanta-mongoose-http-server","url":"https://blog.narfindustries.com/blog/narf-discovers-critical-vulnerabilities-in-cesanta-mongoose-http-server"}]}},"nvd":{"publishedDate":"2023-06-23 20:15:00","lastModifiedDate":"2023-09-06 17:15:00","problem_types":["NVD-CWE-Other"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*","versionEndExcluding":"7.10","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}