CVE-2026-107231

Name	CVE-2026-107231
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1150331

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
async-http-client (PTS)	bookworm (security)	2.12.3-1+deb12u1	vulnerable
	sid, bookworm	2.12.3-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
async-http-client	source	(unstable)	(unfixed)			1150331

Notes

https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-rqf5-2wxv-rjf4
https://github.com/AsyncHttpClient/async-http-client/commit/c8d639bf6ac341d377d610a93570bcd15565f1a6 (async-http-client-project-2.16.1)