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CVE-2026-107284

AsyncHttpClient: WebSocket handshake continues after a failed Sec-WebSocket-Accept check PUBLISHED

Description (CNA)

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.12 and 2.16.1, WebSocketHandler.upgrade aborts a handshake whose Sec-WebSocket-Accept value is missing or invalid but continues into pipeline installation and onOpen delivery. Frames coalesced with the invalid 101 response can be decoded and delivered from a peer that did not prove the handshake, although the request future fails and the channel closes. This issue is fixed in versions 3.0.12 and 2.16.1.

Affected (CNA)

Vendor / productVersions
AsyncHttpClient / async-http-clientaffected >= 3.0.0, < 3.0.12; affected >= 2.0.0, < 2.16.1

CWE

CWE-345, CWE-670

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.