Async-Http-Client up to 2.16.0/3.0.12 HTTP/1.1 Connection-Pool access control

Summaryinfo

A vulnerability classified as critical was found in Async-Http-Client up to 2.16.0/3.0.12. Affected by this vulnerability is an unknown functionality of the component HTTP1.1 Connection-Pool. Such manipulation leads to access control. This vulnerability is traded as CVE-2026-107281. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Async-Http-Client up to 2.16.0/3.0.12 and classified as critical. Affected by this issue is an unknown function of the component HTTP1.1 Connection-Pool. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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, the HTTP/1.1 connection-pool key excludes the authenticated principal for connection-oriented NTLM and Negotiate authentication. A pooled socket authenticated for one request can be reused by a request carrying another principal, and the server executes that later request as the first identity. Basic and Digest are not affected because they authenticate each request. This issue is fixed in versions 3.0.13 and 2.16.1.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-107281 since 10/07/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 2.16.1 or 3.0.13 eliminates this vulnerability.

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Productinfo

Name

• Async-Http-Client

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16.0
• 3.0.0
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5
• 3.0.6
• 3.0.7
• 3.0.8
• 3.0.9
• 3.0.10
• 3.0.11
• 3.0.12

CPE 2.3info

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CPE 2.2info

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