High 8.7Published Oct 7, 2026

CVE-2026-107231AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the password in cleartext

Updated under an hour ago (2026-10-19 09:20 UTC)

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It affects AsyncHttpClient async-http-client. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.24%, higher than 14% of scored CVEs.

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Every CVE for AsyncHttpClient async-http-client

Exploited in the last 30 days

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: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-319, CWE-522, CWE-757
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.24% (percentile 14)
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

AsyncHttpClient async-http-client asynchttpclient:async_http_client (from the name)	from 3.0.0.Beta1, < 3.0.13; from 2.0.0, < 2.16.1	CNA record

References

https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-rqf5-2wxv-rjf4x-refsource-confirm
https://github.com/AsyncHttpClient/async-http-client/commit/8376866aa9b5a7653ad19db9d472692f875caa83x-refsource-misc
https://github.com/AsyncHttpClient/async-http-client/commit/c8d639bf6ac341d377d610a93570bcd15565f1a6x-refsource-misc
https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1x-refsource-misc
https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.