CVE-2026-107231 — AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the password in cleartext
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 t…
Published: 2026-10-07 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7