CVE-2026-107227: CWE-400: Uncontrolled Resource Consumption in AsyncHttpClient async-http-client
Description
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.2.0 until 3.0.14, WebSocket permessage-deflate decompression is unbounded when compression is enabled. The inbound pipeline aggregates compressed frames before WebSocketClientCompressionHandler inflates them, so webSocketMaxFrameSize and webSocketMaxBufferSize do not bound decompressed output. A malicious WebSocket peer can send a small compressed message that expands to a very large Netty buffer and exhausts JVM heap. This issue is fixed in version 3.0.14.
CVSS v3.1
Score 7.5high
Affected software
AsyncHttpClient
async-http-client
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-07T14:34:14.817Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac6b3c62cdf04f6567ed5bd
Added to database: 10/07/2026, 21:04:06 UTC
Last updated: 10/07/2026, 21:04:06 UTC
Views: 1
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