CVE-2026-107228 AsyncHttpClient CookieStore Silently Overrides Caller's Explicit Cookie Header via setHeader (Bypass of CVE-2024-53990 Fix)
Attackers can hijack sessions in shared AsyncHttpClient instances because the cookie store overrides explicit headers, bypassing previous fixes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107228?
CVE-2026-107228 is a medium-severity authentication bypass vulnerability in AsyncHttpClient async-http-client, published on 7 Oct 2026. Any signed-in user can exploit it over the network, 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 2.1.0 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.
Weakness: CWE-287
Which versions are affected by CVE-2026-107228?
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 2.1.0 to 2.16.1 | None |
org.asynchttpclient:async-http-client Maven | From 2.1.0 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-2026-107228?
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-2026-107228 being exploited?
There is no known exploitation of CVE-2026-107228 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-107228, GHSA-2jwh-9rmr-j4xf, MINI-5jh9-5wp4-h92q, MINI-w782-qpp6-q395, UBUNTU-CVE-2026-107228.