Asymmetric Resource Consumption (Amplification) Affecting github.com/apple/swift-nio-http2 package, versions <1.38.0
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Test your applications- Snyk IDSNYK-SWIFT-APPLESWIFTNIOHTTP2-11958969
- published18 Aug 2025
- disclosed13 Aug 2025
- creditGal Bar Nahum, AnatBB, YanivRL
Introduced: 13 Aug 2025
New CVE NOT AVAILABLE CWE-405 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade apple/swift-nio-http2 to version 1.38.0 or higher.
Overview
apple/swift-nio-http2 is a HTTP/2 support for SwiftNIO.
Affected versions of this package are vulnerable to Asymmetric Resource Consumption (Amplification) due to the handling of HTTP/2 connections. An attacker can cause resource exhaustion by interleaving malicious traffic with legitimate traffic to evade existing prevention mechanisms.