Auth bypass in Asynchttpclient Async-Http-Client
CVE-2026-107230
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Asynchttpclient Async-Http-Client — versions >= 2.0.0, <= 2.16.1, >= 3.0.0, < 3.0.14
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-107230?
- CVE-2026-107230 is a high-severity vulnerability in Asynchttpclient Async-Http-Client, classified under Origin Validation Error. CVSS score: 7.4/10. Published 2026-10-07.
- How severe is CVE-2026-107230?
- High severity. CVSS v3 base score is 7.4 out of 10.