CVE-2026-107231
High
Description
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.
SeverityHigh
CVSS8.7
Exploit probability—
ProductOrg.asynchttpclient:async-http-client
PublishedOct 7, 2026
First seenOct 7, 2026
Weakness typeCWE-319CWE-319CWE-522CWE-522CWE-757CWE-757
How to fix
Update
- org.asynchttpclient:async-http-client3.0.13, 2.16.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| org.asynchttpclient:async-http-clientMaven | 3.0.0.Beta1 ≤ v < 3.0.13, 2.0.0 ≤ v < 2.16.1 | 3.0.13, 2.16.1 |
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