CVE-2026-107283
Published:October 07, 2026
Updated:October 09, 2026
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, Realm.Builder generates the HTTP Digest client nonce with ThreadLocalRandom rather than a cryptographically secure random source. Digest relies on an unpredictable cnonce to resist chosen-plaintext and credential precomputation attacks, so an observer able to infer generator state can reduce the protection of the authentication exchange. This issue is fixed in versions 3.0.12 and 2.16.1.
Affected Packages
https://github.com/AsyncHttpClient/async-http-client.git (GITHUB):
Affected version(s) >=async-http-client-project-2.0.0 <async-http-client-project-2.16.1Fix Suggestion:
Update to version async-http-client-project-2.16.1https://github.com/AsyncHttpClient/async-http-client.git (GITHUB):
Affected version(s) >=async-http-client-project-3.0.0 <async-http-client-project-3.0.12Fix Suggestion:
Update to version async-http-client-project-3.0.12org.asynchttpclient:async-http-client (JAVA):
Affected version(s) >=2.0.0 <2.16.1Fix Suggestion:
Update to version 2.16.1org.asynchttpclient:async-http-client (JAVA):
Affected version(s) >=3.0.0 <3.0.12Fix Suggestion:
Update to version 3.0.12Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
EPSS
Base Score:
0.26