CVE-2019-8849 json
SwiftNIO SSL arbitrary code execution vulnerability
published 2019-12-18 6 y ago modified 2026-06-17 4 mo ago also EUVD-2022-3826 , GHSA-frg3-gpcx-968f
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.2%
- EPSS 2.2% chance of exploitation in 30 days, percentile 82%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- swift github.com/apple/swift-nio-ssl 2.4.1
- Apple Swift-Ubuntu SwiftNIO SSL 2.4.1
Exploit prediction
2.24% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| swift | github.com/apple/swift-nio-ssl | >=2.0.0, <2.4.1 |
2.4.1 |
Affected products
- Apple Swift-Ubuntu
References
-
github.com
/apple/swift-nio-ssl/commit/109faef770994e71b6bafcc015e2e96b88a4af8c
web
-
support.apple.com
/HT210772
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2019-8849
advisory
-
github.com
/apple/swift-nio-ssl
package
-
github.com
/apple/swift-nio-ssl/releases/tag/2.4.1
web
-
security.snyk.io
/vuln/SNYK-COCOAPODS-SWIFTNIOSSL-8492737
web
Sources
- CVE List CVE-2019-8849
- GitHub Advisory GHSA-frg3-gpcx-968f
- NVD CVE-2019-8849
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