{"id":"CVE-2023-34188","details":"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.","modified":"2026-04-10T04:58:24.665050Z","published":"2023-06-23T20:15:09.053Z","references":[{"type":"ADVISORY","url":"https://github.com/cesanta/mongoose/compare/7.9...7.10"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20250228-0001/"},{"type":"FIX","url":"https://github.com/cesanta/mongoose/pull/2197"},{"type":"FIX","url":"https://github.com/cesanta/mongoose/commit/4663090a8fb036146dfe77718cff612b0101cb0f"},{"type":"ARTICLE","url":"https://blog.narfindustries.com/blog/narf-discovers-critical-vulnerabilities-in-cesanta-mongoose-http-server"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/cesanta/mongoose","events":[{"introduced":"0"},{"fixed":"b379816178abdcd59135aa32f990a4b3bbbfb54b"},{"fixed":"4663090a8fb036146dfe77718cff612b0101cb0f"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"7.10"}]}}],"versions":["3.2","3.3","3.4","3.5","3.6","3.7","3.8","4.0","4.1","5.0","5.1","5.2","5.3","5.4","5.5","5.5_20140120","5.6","6.0","6.1","6.10","6.11","6.12","6.13","6.14","6.15","6.16","6.17","6.18","6.2","6.3","6.4","6.5","6.6","6.7","6.9","7.0","7.1","7.2","7.3","7.4","7.5","7.6","7.7","7.8"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-34188.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}