async-http-client up to 3.0.13 Cookie Store setHeader session fixiation

Summaryinfo

A vulnerability has been found in async-http-client up to 3.0.13 and classified as critical. This affects the function setHeader of the component Cookie Store. This manipulation causes session fixiation. The identification of this vulnerability is CVE-2026-107228. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in async-http-client up to 3.0.13. It has been declared as critical. Affected by this vulnerability is the function setHeader of the component Cookie Store. The manipulation with an unknown input leads to a session fixiation vulnerability. The CWE definition for the vulnerability is CWE-384. Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.1.0 until 3.0.14, the enabled-by-default cookie store replaces a Cookie header explicitly supplied through setHeader or addHeader whenever the store contributes any cookie for the origin. In a shared client, stored cookies originating from one user can replace a different user's request cookie, causing the request to execute under the wrong session. This bypasses the earlier CVE-2024-53990 remediation, which covered cookies supplied through addCookie but not a directly supplied header. This issue is fixed in version 3.0.14.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-107228 since 10/07/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 3.0.14 eliminates this vulnerability.

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Productinfo

Name

• async-http-client

Version

• 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
• 3.0.13

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CPE 2.2info

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