CVE-2019-8849

SwiftNIO SSL arbitrary code execution vulnerability

Published 18 Dec 2019Modified 17 Jun 2026

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

GHSA9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, GHSA.

Description

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.

Affected packages and fixed versions

Source	Package	Fixed in
cocoapods::GitHub Security Advisory Swift	CNIOBoringSSL, CNIOBoringSSLShims, SwiftNIOSSL	2.4.1
swift::GitHub Security Advisory Swift	github.com/apple/swift-nio-ssl	2.4.1

Show all 4 entries from 2 sources

Source	Package	Fixed in
cocoapods::GitHub Security Advisory Swift	CNIOBoringSSL	2.4.1
cocoapods::GitHub Security Advisory Swift	CNIOBoringSSLShims	2.4.1
cocoapods::GitHub Security Advisory Swift	SwiftNIOSSL	2.4.1
swift::GitHub Security Advisory Swift	github.com/apple/swift-nio-ssl	2.4.1

References

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Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.