Disclosure summary
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-reported weakness categories
CWE-319, CWE-522, CWE-757
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-107231
Open original source · Updated Oct 09, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
GitHub Reviewed Security Advisories · GHSA-rqf5-2wxv-rjf4
Open original source · Updated Oct 08, 2026
AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the password in cleartext
Source severity: HIGH / 8.7
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| maven | org.asynchttpclient:async-http-client | >= 3.0.0.Beta1, | 3.0.13 |
| maven | org.asynchttpclient:async-http-client | >= 2.0.0, | 2.16.1 |
Original records & references
PUBLISHED 2026-10-07T18:17:03-04:00
MODIFIED 2026-10-09T23:17:06-04:00
INGESTED 2026-10-10T20:55:02-04:00