CVE-2026-107284 — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses.
Description
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.
CVSS v3.1 base metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:NLow severity
Band computed from the CVSS base score, not the source's own label — so it means the same thing across every feed.
AV
Network
Attack Vector
AC
High
Attack Complexity
PR
None
Privileges Required
UI
None
User Interaction
S
Unchanged
Scope
C
None
Confidentiality
I
Low
Integrity
A
None
Availability
References
- advisory[email protected]https://github.com/AsyncHttpClient/async-http-client/commit/75a278550aa9a980009d022fb4e635f9c8738c03
- advisory[email protected]https://github.com/AsyncHttpClient/async-http-client/commit/ccdcaa627db6d96dcc42105212cb3ba5048bd7f9
- advisory[email protected]https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1
- advisory[email protected]https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.12
- advisory[email protected]https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-rwhr-j9rv-85f8
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