{"cve":"CVE-2018-20578","nvd":{"published":"2018-12-28T18:29:00.253","modified":"2026-06-17T01:53:07.313","status":"Modified","description":"An issue was discovered in NuttX before 7.27. The function netlib_parsehttpurl() in apps/netutils/netlib/netlib_parsehttpurl.c mishandles URLs longer than hostlen bytes (in the webclient, this is set by default to 40), leading to an Infinite Loop. The attack vector is the Location header of an HTTP 3xx response.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-835"],"references":["https://bitbucket.org/nuttx/nuttx/downloads/nuttx-7_27-README.txt","https://bitbucket.org/nuttx/nuttx/issues/119/denial-of-service-infinite-loop-while","https://bitbucket.org/nuttx/nuttx/downloads/nuttx-7_27-README.txt","https://bitbucket.org/nuttx/nuttx/issues/119/denial-of-service-infinite-loop-while"],"products":["nuttx:nuttx"],"source":"nvd","synced_at":"2026-10-19T20:54:36.112582389+00:00"},"epss":{"cve":"CVE-2018-20578","score":0.01599,"percentile":0.75785,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}