What is CVE-2026-107284?

CVE-2026-107284 is a low-severity vulnerability in Asynchttpclient Async-Http-Client, classified under Insufficient Verification of Data Authenticity. CVSS score: 3.7/10. Published 2026-10-07.

How severe is CVE-2026-107284?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Asynchttpclient Async-Http-Client

CVE-2026-107284

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.

Published 2026-10-07 · last modified 2026-10-08.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Asynchttpclient Async-Http-Client — versions >= 2.0.0, < 2.16.1, >= 3.0.0, < 3.0.12

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-107284?: CVE-2026-107284 is a low-severity vulnerability in Asynchttpclient Async-Http-Client, classified under Insufficient Verification of Data Authenticity. CVSS score: 3.7/10. Published 2026-10-07.
How severe is CVE-2026-107284?: Low severity. CVSS v3 base score is 3.7 out of 10.