CVE-2026-107231 (GCVE-0-2026-107231)

Vulnerability from cvelistv5 – Published: 2026-10-07 21:06 – Updated: 2026-10-07 21:06
VLAI
Title
AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the password in cleartext
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.
Severity
8.7 (High)
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
CWE
  • CWE-319 - Cleartext Transmission of Sensitive Information
  • CWE-522 - Insufficiently Protected Credentials
  • CWE-757 - Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
Assigner
References
Impacted products
Vendor Product Version CPE status
AsyncHttpClient async-http-client Affected: >= 3.0.0.Beta1, < 3.0.13
Affected: >= 2.0.0, < 2.16.1
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    }
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