Vulnerability · Published Oct 7, 2026 · Assigned by GitHub_M
CVE-2026-107230AsyncHttpClient: Pooled connections can still be shared across NTLM, Negotiate and proxy logins
High 7.4
In plain English
A high-severity incorrect authorization in async-http-client from AsyncHttpClient. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | async-http-client | no fix listed | DEBIAN-CVE-2026-107230 |
| Maven | org.asynchttpclient:async-http-client | 3.0.14 | GHSA-v2j5-22fr-j62r |
| Maven | org.asynchttpclient:async-http-client | no fix listed | GHSA-v2j5-22fr-j62r |
| Ubuntu:22.04:LTS | async-http-client | no fix listed | UBUNTU-CVE-2026-107230 |
| Ubuntu:24.04:LTS | async-http-client | no fix listed | UBUNTU-CVE-2026-107230 |
| Ubuntu:26.04:LTS | async-http-client | no fix listed | UBUNTU-CVE-2026-107230 |
| Ubuntu:26.10 | async-http-client | no fix listed | UBUNTU-CVE-2026-107230 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AsyncHttpClient | async-http-client | >= 3.0.0, < 3.0.14>= 2.0.0, <= 2.16.1 |
Weakness: CWE-346, CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
References
- https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-v2j5-22fr-j62r x_refsource_CONFIRM
- https://github.com/AsyncHttpClient/async-http-client/commit/d3bb4d68b41acf5d3ab7541afa9fdfe7ec3ba054 x_refsource_MISC
- https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.14 x_refsource_MISC