CVE-2026-107231highCWE-319CWE-522CWE-757

CVE-2026-107231: high-severity vulnerability in AsyncHttpClient async-http-client

AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the password in cleartext

Published

18Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.7
exploitation probability
—
observed exploitation
nono source reports it
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.13 and 2.16.1, Realm.Builder treats a Digest challenge that yields no usable nonce as a Basic challenge. A malicious origin or proxy can label a challenge Digest while omitting or emptying the nonce, causing the client to resend the username and password using reversible Basic authentication. Both origin and proxy challenge parsers are affected. This issue is fixed in versions 3.0.13 and 2.16.1.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products
AsyncHttpClient · async-http-client
Related CVEs — AsyncHttpClient async-http-client

In the same product, most dangerous first.

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References
https://github.com/AsyncHttpClient/async-http-client/commit/8376866aa9b5a7653ad19db9d472692f875caa83https://github.com/AsyncHttpClient/async-http-client/commit/c8d639bf6ac341d377d610a93570bcd15565f1a6https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-rqf5-2wxv-rjf4