{"id":"CVE-2020-5403","title":"Reactor Netty HttpServer, versions 0.9.3 and 0.9.4, is exposed to a URISyntaxException that causes the connection to be closed prematurely instead of producing a 400 response.","summary":"Reactor Netty HttpServer, versions 0.9.3 and 0.9.4, is exposed to a URISyntaxException that causes the connection to be closed prematurely instead of producing a 400 response.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-20","CWE-755"],"vendor":"broadcom","product":"reactor_netty","affected":["reactor_netty = 0.9.3","reactor_netty = 0.9.4"],"published":"2020-03-03","updated":"2026-09-04","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-5403","references":[{"url":"https://pivotal.io/security/cve-2020-5403","label":"security@pivotal.io"},{"url":"https://pivotal.io/security/cve-2020-5403","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.01146,"epssPercentile":0.64885,"ingestedAt":"2026-09-04T19:26:35.298Z","slug":"CVE-2020-5403","body":"## Overview\n\nReactor Netty HttpServer, versions 0.9.3 and 0.9.4, is exposed to a URISyntaxException that causes the connection to be closed prematurely instead of producing a 400 response.\n\n## Affected\n\n- `reactor_netty = 0.9.3`\n- `reactor_netty = 0.9.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}