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CVE-2026-85717
Published:September 17, 2026
Updated:September 22, 2026
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.14.5 to 2.16.0 and from 3.0.9 to 3.0.11, a client configured with a client-wide Realm and redirect following can disclose credentials after a cross-origin redirect because the Interceptors authentication path falls back to the client configuration after redirect handling clears the per-exchange realm. If the attacker-controlled target returns 401, the client can send Basic or Digest credentials or a Negotiate or NTLM token to that origin. Per-request realms are stripped correctly, and this issue is a residual bypass of the earlier cross-origin credential-stripping fixes. This issue is fixed in versions 2.16.1 and 3.0.12.
Affected Packages
https://github.com/AsyncHttpClient/async-http-client.git (GITHUB):
Affected version(s) >=async-http-client-project-2.14.5 <async-http-client-project-2.16.1
Fix Suggestion:
Update to version async-http-client-project-2.16.1
https://github.com/AsyncHttpClient/async-http-client.git (GITHUB):
Affected version(s) >=async-http-client-project-3.0.9 <async-http-client-project-3.0.12
Fix Suggestion:
Update to version async-http-client-project-3.0.12
org.asynchttpclient:async-http-client (JAVA):
Affected version(s) >=2.14.5 <2.16.1
Fix Suggestion:
Update to version 2.16.1
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CVSS v4
Base Score:
8.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Insufficiently Protected Credentials
Exposure of Sensitive Information to an Unauthorized Actor
EPSS
Base Score:
0.33