{"id":"CVE-2019-8849","aliases":["GHSA-frg3-gpcx-968f"],"url":"https://o3.security/vulnerability/CVE-2019-8849","summary":"SwiftNIO SSL arbitrary code execution vulnerability","details":"The issue was addressed by signaling that an executable stack is not required. This issue is fixed in SwiftNIO SSL 2.4.1. A SwiftNIO application using TLS may be able to execute arbitrary code.","published":"2019-12-18T18:15:44.990Z","modified":"2026-10-24T14:06:55.848488198Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"SwiftURL","name":"github.com/apple/swift-nio-ssl","fixedVersion":"2.4.1"}],"fix":{"url":"https://github.com/apple/swift-nio-ssl/commit/109faef770994e71b6bafcc015e2e96b88a4af8c","label":"apple/swift-nio-ssl@109faef"},"references":[{"type":"ADVISORY","url":"https://support.apple.com/HT210772"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-8849"},{"type":"WEB","url":"https://github.com/apple/swift-nio-ssl/commit/109faef770994e71b6bafcc015e2e96b88a4af8c"},{"type":"PACKAGE","url":"https://github.com/apple/swift-nio-ssl"},{"type":"WEB","url":"https://github.com/apple/swift-nio-ssl/releases/tag/2.4.1"},{"type":"WEB","url":"https://security.snyk.io/vuln/SNYK-COCOAPODS-SWIFTNIOSSL-8492737"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T14:06:55.848488198Z"}}