CVE-2026-107284
LOW
CVSS 3.7
Published: 2026-10-07
Modified: 2026-10-08
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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.
Quick Facts
| CVE ID | CVE-2026-107284 |
| CVSS Score | 3.7 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
| Published | 2026-10-07 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |
References
- https://github.com/AsyncHttpClient/async-http-client/commit/…
- https://github.com/AsyncHttpClient/async-http-client/commit/…
- https://github.com/AsyncHttpClient/async-http-client/release…
- https://github.com/AsyncHttpClient/async-http-client/release…
- https://github.com/AsyncHttpClient/async-http-client/securit…