CVE-2026-107230 AsyncHttpClient: Pooled connections can still be shared across NTLM, Negotiate and proxy logins
Attackers can reuse authenticated connections to access data or authority belonging to other identities due to improper connection pool partitioning.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107230?
CVE-2026-107230 is a high-severity authentication bypass vulnerability in AsyncHttpClient async-http-client, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.0.0 until 3.0.14, connection-pool partitioning still omits identity-defining fields for Kerberos, SPNEGO, NTLM, and authenticated proxy connections. Logins without a configured principal, proxy realms, identities sharing a user name, and SOCKS or CONNECT proxy logins can reuse a socket authenticated as a different identity. A later request is then executed under the first identity and can expose that identity's data or authority to another caller. In the affected execution path, SpnegoEngine, NTLM, Kerberos, SPNEGO, SOCKS, and CONNECT control or expose the vulnerable behavior. This issue is fixed in version 3.0.14.
Which versions are affected by CVE-2026-107230?
4 open source packages ship an affected version, including org.asynchttpclient:async-http-client.
| Package | Affected | Fixed in |
|---|---|---|
org.asynchttpclient:async-http-client Maven | From 2.0.0 to 2.16.1 | None |
org.asynchttpclient:async-http-client Maven | From 2.0.0 to 2.16.1 | None |
org.asynchttpclient:async-http-client Maven | From 3.0.0 | 3.0.14 |
org.asynchttpclient:async-http-client Maven | From 3.0.0 | 3.0.14 |
How do I fix CVE-2026-107230?
Upgrade org.asynchttpclient:async-http-client to 3.0.14 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-107230 being exploited?
There is no known exploitation of CVE-2026-107230 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-107230, GHSA-v2j5-22fr-j62r, MINI-635g-6pfv-9vmc, MINI-8cmg-j6cq-jgc6, ROOT-APP-MAVEN-CVE-2026-107230, UBUNTU-CVE-2026-107230.