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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-107284
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-07 22:17:04 UTC
Updated2026-10-07 22:17:04 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-345 | CWE-670 | CWE-345 CWE-345: Insufficient Verification of Data Authenticity | CWE-670 CWE-670: Always-Incorrect Control Flow Implementation

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA AsyncHttpClient Async-http-client affected >= 3.0.0, < 3.0.12 Not specified
CNA AsyncHttpClient Async-http-client affected >= 2.0.0, < 2.16.1 Not specified

References

ReferenceSourceLinkTags
github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-cli... [email protected] github.com
github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-rw... [email protected] github.com
github.com/AsyncHttpClient/async-http-client/commit/75a278550aa9a980009d... [email protected] github.com
github.com/AsyncHttpClient/async-http-client/commit/ccdcaa627db6d96dcc42... [email protected] github.com
github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-cli... [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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